Question

A physics student stands on a cliff overlooking a lake and decides to throw a tennis ball to her friends in the water below. She throws the tennis ball with a velocity of 22.5 m/s22.5 m/s at an angle of 40.5∘40.5∘ above the horizontal. When the tennis ball leaves her hand, it is 11.5 m11.5 m above the water. How far does the tennis ball travel horizontally before it hits the water? Neglect any effects of air resistance when calculating the answer.

Answer #1

A person throws two identical stones from the top of a 200-m
high cliff overlooking a lake. Stone 1 is thrown at an angle of
30o above the horizontal with an initial speed of 40
m/s. Stone 2 is thrown at an angle of 30o below the
horizontal with an initial speed of 40 m/s. Neglect air
resistance.
Which stone hits the water first?
Stone 1.
They hit at the same time.
Stone 2.
Which stone strikes the water with...

1. From the top of a cliff overlooking a lake, a person throws
two stones. The stones have identical initial speeds, but stone 1
is thrown downward at an angle below the horizontal, while stone 2
is thrown upward at the same angle above the horizontal. Neglect
air resistance and decide which stone, if either, strikes the water
with greater velocity (Answer conceptually)
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again, the ball...

21) A person carries a 25.0-N rock through the path shown in the
figure, starting at point A and ending at point B. The total time
from A to B is 1.50 min. How much work did gravity do on the rock
between A and B?
A) 625 J
B) 20.0 J
C) 275 J
D) 75 J
E) 0 J
22) A person carries a 2.00-N pebble through the path shown in
the figure, starting at point A and...

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