# AP B HW 3 – Kinematics 2D – due 09/30/2013 ...

Mechanics

Nov 14, 2013 (4 years and 6 months ago)

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AP B
HW
3

Kinematics 2D

due 09/30/2013

Name_____________________ Per____

For a complete solution of each problem, you are required to write the
equation
(s) that describes the given scenario
and complete
substitution

with given data.

1.

(
3 points
) At a monster
-
car
-
show, a stunt driver wants to make his car jump over eight cars parked side by
side below a horizontal ramp. The vertical height of the ramp is
2 m above the cars, and the horizontal
distance he must clear is 20 m. With what minimum speed must he drive off the horizontal ramp?

2.

(
6 points
) At serve, a tennis player aims to hit the ball horizontally.

a)

What minimum speed is required for the ball t
o clear the 0.90
-
m
-
high net about 15.0 m from the server
if the ball is “launched” from a height of 2.50 m?

b)

Where will the tennis ball land if it just clears the net?

c)

How long will the tennis ball be in the air?

3.

(
6 points
) A small heavy stone is th
rown from ground level to the top of a cliff which is 180 m away and
120 m high. If the stone lands on top of the cliff 6s after it is fired, find the
initial velocity

of the stone
(
magnitude and direction
). Assume

that

the air resistance is negligible.