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Homework 2 Due January 23 2007
1.
The figure below is a graph of
v
vs
t
for a particle moving along a straight line. The
position of the particle at
t
= 0 s is
x
= 5 m.
a)
Find the position of the particle at
t
= 1s and at
t
= 5 s.
b)
Sketch the acceleration
a
versus
t
.
2.
Ball A is dropped from the top of a building of height
h
at the same instant that ball B
is thrown vertically upward from the ground. When the balls collide, they are moving
in opposite directions
, and the speed of A is three times the speed of B. How far
above the ground does the collision occur?
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View Full DocumentHomework 2 Due January 23 2007
3.
A projectile is fired into the air from the top of a 200m cliff above a flat valley (see
figure). Its initial velocity is 60 m/s at 60
°
with the horizontal. Neglecting air
resistance, determine distance
d
(or how far from the base of the cliff does the
projectile land).
4.
Initially, a particle is moving due west with a speed of 40 m/s, and 5 s later it is
moving north with a speed of 30 m/s.
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 Spring '08
 HerreraSiklody
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