Question

A boy uses a slingshot to launch a pebble straight up into the air. The pebble reaches a height of 38.0 m above the launch point 1.0 seconds later. Assume air resistance is negligible.

(a) What was the pebble's initial speed (just after leaving the
slingshot)?

42.9 m/s

(b) How much time did it take for the pebble to first reach a
height of 19.0 m above its launch point?

? s

You toss a tennis ball straight upward. At the moment it leaves your hand it is at a height of 1.3 m above the ground, and it is moving at a speed of 6.0 m/s.

(a) How much time does it take for the tennis ball to reach its
maximum height?

?s

(b) What is the maximum height above the ground that the tennis
ball reaches?

3.13 m

(c) When the tennis ball is at a height of 2.6 m above the ground,
what is its speed?

?m/s

Answer #1

a) Initial Speed,

b)

Solving for t ;

Initial Speed,

a) Time for Maximum height

b) Maximum height,

c)

A 0.240 g pebble is fired at a speed of 14.6 m/s from the top of
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A ball which is thrown straight up takes 3.50 s to reach the
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A ball is thrown straight up, with no air resistance. Its speed
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Calculate the maximum height it reaches, in meters. Use g
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Find the maximum height the ball reaches with respect to the
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A tennis player tosses a tennis ball straight up and then
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magnitude ______
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direction_____
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magnitude
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direction____
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magnitude
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direction
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magnitude
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direction
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