A child standing at the top edge of a 21.0-m high cliff kicks a soccer ball....
A child standing at the top edge of a 21.0-m high cliff kicks a soccer ball. The ball’s initial velocity is 13.1 m/s, in a direction 31.2° above the horizontal. Ignore drag for this problem. Provide all answers to 3 SF.
(a) State your choices for the speed and direction of the initial velocity, and use them to calculate the horizontal and vertical components of the ball's initial velocity.
(b) Calculate the vertical component of the ball's velocity just as it hits the ground.
(c) Explain why your calculator shows you an incorrect (or incomplete) answer to (b).
(d) Calculate how far from the cliff the ball lands.
(e) Calculate the speed of the ball just as it hits the ground.
(f) Whether you got an answer or not, how should the speed found in (e) compare to the speed chosen in (a)? Explain the physics (no equations or math).
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A child standing at the top edge of a 21.0-m high cliff kicks a
soccer ball....
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1. A ball is thrown off a cliff overlooking a lake. The cliff is 9.60 m above the lake. The ball has an initial speed of 2.85 m/s and is thrown at an angle of 20.0° below the horizontal. (a) Calculate the time after the ball is thrown until it strikes the water. (b) Calculate the ball’s speed just before striking the water. (c) How far from the base of the cliff does the ball hit the lake? (d) Sketch...
A ball is thrown off a cliff overlooking a lake. The cliff is 9.60 m above...
A ball is thrown off a cliff overlooking a lake. The cliff is 9.60 m above the lake. The ball has an initial speed of 2.85 m/s and is thrown at an angle of 20.0° below the horizontal. (a) Calculate the time after the ball is thrown until it strikes the water. (b) Calculate the ball’s speed just before striking the water. (c) How far from the base of the cliff does the ball hit the lake? (d) Sketch the...
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