In the horizontal direction, there are 3 possible variables to work out.

Speed, distance and time. We know:. Now, in the vertical direction, there are 5 possible variables to work out. In the horizontal, the speed remains constant as there is no force acting on it to change it. We now also know, from what we worked out earlier, that the ball takes 0. We can use this time to work out the height of the ball when it reaches the goal, and determine whether that height is greater than, less than or equal to the height of the crossbar 2.

This shows us that the ball ends up going much higher than the crossbar 5. In this problem, we have assumed that the crossbar is of negligible thickness, that the ground is horizontal, that there is no air resistance and therefore the ball travels in a perfect parabola. Study resources Family guide University advice.

Log in Sign up. Find a tutor How it works Prices Resources. Sign up. It travels towards the goal which is 25 m away. The crossbar of the goal is 2. A Does the ball go into the goal, hit the crossbar exactly, or go over the top? Answered by Ehsaan S.

Deepl translatorNeed help with Maths? One to one online tution can be a great way to brush up on your Maths knowledge. Related Maths A Level answers. What does differentiation actually do?

Cpu cache ratioUsing mathematical induction, prove De Moivre's Theorem. We're here to help.No one gets in the way until after it hits the ground. Assuming that the ground is level and that there is negligible air. A football is kicked at ground level with a speed of Question: How much later does the football hit the ground? How much later does it hit the ground?

Zte mf288 batteryHow much does it hit the ground? How much later, in seconds, does it hit the ground? A football is kicked from the ground at an initial angle of With what minimum speed should it be kicked to hit the horizontal crossbar of the goal post?

After a football is kicked, it reaches a maximum height of 14 m and it hits the ground 32m from where it was kicked.

Littafin gidan uncle page 7After a soccer ball is kicked, it reaches a maximum height of 8m and it hits the ground 38m from where it was kicked. The paths of both. A ball is kicked at ground level with a speed of A football kicked with an initial speed of At what angle was the ball kicked? What are the steps to solving this problem?

A kicked football leaves the ground at an angle with a velocity of Suppose the kick is attempted A certain projectile is launched with an initial speed v0. What was the launch angle?

The "hang time" of a punt is measured to be 3. If the ball was kicked at an angle of A football is kicked from a position on the ground that is If the ball strikes the top cross bar which is 3. Assume the ground is horizontal. A receiver on the goal line 67 yd away in the direction of the kick starts running to meet the ball at that instant. What must be his minimum speed in. A receiver on the goal line 63 yd away in the direction of the kick starts running to meet the ball at that instant.

A place kicker must kick a football from a point When kicked the ball leaves the ground with a speed of By how much does the ball. I've calculated: Initial Speed: How long is the football in the air?In the horizontal direction, there are 3 possible variables to work out.

Speed, distance and time. We know:. Now, in the vertical direction, there are 5 possible variables to work out. In the horizontal, the speed remains constant as there is no force acting on it to change it. We now also know, from what we worked out earlier, that the ball takes 0.

Gallery needs your permission to access sd cardWe can use this time to work out the height of the ball when it reaches the goal, and determine whether that height is greater than, less than or equal to the height of the crossbar 2. This shows us that the ball ends up going much higher than the crossbar 5. In this problem, we have assumed that the crossbar is of negligible thickness, that the ground is horizontal, that there is no air resistance and therefore the ball travels in a perfect parabola.

Study resources Family guide University advice. Log in Sign up. Find a tutor How it works Prices Resources. Sign up. It travels towards the goal which is 25 m away. The crossbar of the goal is 2. A Does the ball go into the goal, hit the crossbar exactly, or go over the top?

Answered by Ehsaan S. Need help with Maths? One to one online tution can be a great way to brush up on your Maths knowledge.

Spagna, nuovo sommergibile s-80 troppo grande per banchineRelated Maths A Level answers. Find the Cartesian equation of the curve. We're here to help.To produce the greatest horizontal distance in a punt kick the ball must be projected at an appropriate angle.

Here, we investigated the optimum projection angle that maximises the distance attained in a punt kick by a soccer goalkeeper. The kicks were recorded by a video camera at Hz and a 2 D biomechanical analysis was conducted to obtain measures of the projection velocity, projection angle, projection height, ball spin rate, and foot velocity at impact.

A long punt kick by a soccer goalkeeper is a very useful skill Figure 1. Most experienced keepers are able to kick the ball from within their penalty area to well beyond the halfway line and so turn a defensive situation into an offensive one.

It is well known that a greater projection velocity results in a greater kick distance de Mestre, ; Wesson, However, the optimum projection angle to achieve maximum distance in a punt kick is less clear. Even a small dependence of projection velocity on projection angle is sufficient to produce a substantial shift in the optimum projection angle Hubbard, Three factors were responsible for the greater projection velocity at low projection angles: 1 when using low projection angles the athlete does not need to overcome as great a fraction of the weight of the projectile Linthorne, ; Wakai and Linthorne, ; 2 in throwing, the musculoskeletal structure of the human body is such that the athlete can generate more throwing force in the horizontal direction than in the vertical direction Linthorne, ; Linthorne and Everett, ; and 3 the athlete may transfer velocity from a run-up to increase the projection velocity Linthorne et al.

The flight of a projectile is also affected by the aerodynamic properties of the projectile and by the height difference between launch and landing. However, in the events studied previously the effects of aerodynamics and launch height on the optimum projection angle were relatively small. All the previous experimental tests of the optimum projection angle were either of throwing events shot put, javelin throw, discus throw, soccer throw-in or jumping events long jump, standing long jump.

Kicking is another fundamental class of human movement but optimum projection angles in kicking activities e. In the study reported here, we investigated the optimum projection angle in a punt kick by a soccer goalkeeper.

To the best of our knowledge there are no published data on projection angles in a soccer punt kick for maximum distance. That is, in kicks at high projection angles the player would use a longer angular distance over which to accelerate the foot assuming that the player starts rotating the kicking leg from the same hip angle.

Also, we expected that changes in projection height would have only a small effect on the optimum projection angle because the range of the kick is very much greater than the height difference between launch and landing Hay, ; Linthorne, In a soccer punt kick the ball is a moderately aerodynamic projectile and so we expected that aerodynamic effects would have a large effect on the range of the kick but only a slight influence on the optimum projection angle de Mestre, ; Linthorne and Everett, In the study reported here, we used a high-speed video camera to measure the projection variables i.

The kicks were performed over a wide range of projection angles. However, these variables are interrelated.

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These equations were then used as inputs in the equations for the aerodynamic flight of a soccer ball. Diagram of a soccer punt kick showing the projection variables that determine the horizontal range of the ball. Two semi-professional male soccer players volunteered to participate in the study. Participant 1 was 21 years, height 1.

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The study was approved by the Human Ethics Committee of Brunel University, the participants were informed of the protocol and procedures prior to their involvement, and written consent to participate was obtained. The kicks were conducted in still air conditions in an outdoor stadium using a FIFA approved match ball Nike English Premiership, size 5 that was inflated to the regulation pressure.

All kicks were performed from a flat grass surface and the landing area was level with the projection surface. The participants wore athletic training clothes and their own football boots. In all trials the participants dropped the ball from about chest height and then kicked the ball without the ball bouncing on the ground.

The order of the projection angles was altered to preclude any effect resulting from the order, and an unlimited rest interval was given between kicks to minimise the effects of fatigue on kicking performance. For each kick the kick distance was measured to the nearest 0. In this study the participants elected to use a short run-up of steps, with the more vertical projection angles being performed from a shorter run-up.

Run-up length was allowed to vary because run-up velocity is one of the kicking technique variables e. Participant 2 performed a similar protocol to Participant 1, with 6 kicks at his preferred projection angle and 25 kicks in total.

However, the kick distances were not measured for this participant. The video camera was mounted on a rigid tripod placed at right angles to the kick direction about 22 m away from the plane of the kick.

**A place kicker must kick a football from a point 36.0 m from the goal. Half the crowd hopes the ball**

The field of view was zoomed to allow the participant and ball to be in the field of view throughout the run-up and kick and for at least 10 frames after impact. The movement space of the video camera was calibrated with nine calibration points on three vertical calibration poles that were placed along the line of the kicking plane and 2 m apart. All digitising was performed by the same operator so as to maximise the consistency of the measured values.Questions are typically answered within 1 hour.

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Operations Management. Chemical Engineering. Civil Engineering. Computer Engineering. Computer Science. Electrical Engineering. Mechanical Engineering. Advanced Math. Advanced Physics. Earth Science. Social Science. Asked May 28, Step 1. The path on which football moves is a trajectory of projectile motion. The time taken by the ball to hit the ground is e Want to see the full answer? Want to see this answer and more?

Tagged in.A football is kicked at ground level with a speed of How much. Favorites Homepage Subscriptions sitemap. How much [From: ] [author: ] [Date: ] [Hit: ]. How much later does it hit the ground?

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Without quantum fluctuations would n.What is the horizontal distance traveled by the ball? I've calculated: Initial Speed: A football kicked with an initial speed of At what angle was the ball kicked? What are the steps to solving this problem? A football is kicked from the ground at an initial angle of With what minimum speed should it be kicked to hit the horizontal crossbar of the goal post? How far has the football traveled horizontally after 0.

Could someone explain this please? A receiver on the goal line 67 yd away in the direction of the kick starts running to meet the ball at that instant.

What must be his minimum speed in. A receiver on the goal line 63 yd away in the direction of the kick starts running to meet the ball at that instant.

A certain projectile is launched with an initial speed v0. What was the launch angle?

The "hang time" of a punt is measured to be 3. If the ball was kicked at an angle of A football is kicked at ground level with a speed of Question: How much later does the football hit the ground? A ball with a mass of 0. Angle from which ball is kicked is 23 degrees and the horizontal leg is 7 feet long.

No one gets in the way until after it hits the ground. Assuming that the ground is level and that there is negligible air. A punter kicks a football at an angle of 45 degrees to the ground.

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