Question

Question1) A car moving North at 12 m/s strikes a stationary car
of equal mass. The first car moves off after the collision at an
angle of 30° East of North with a speed of 8.0 m/s.

a. What is the velocity of the struck car just after
the collision?

b. Show that the collision is inelastic.

c. Explain how dents, skid marks, etc. show that
kinetic energy has been lost.

d. If the collision were perfectly elastic, what would
the speeds of the cars be after the collision if the first car
moved off at the same 30° angle?

Question2) A steel ball of mass 10 kg moves due East at 5.0 m/s. It collides with a rubber ball of mass 5.0 kg moving at 10 m/s due North. After the collision the steel ball moves at an angle of 60° East of North with a speed of 4.0 m/s. What is the velocity of the rubber ball after the collision?

Question3) A ball of mass 3.0 kg moving at a speed of 3.0 m/s
has a head-on collision with a stationary ball of mass 4.0
kg.

a. If the collision were completely inelastic, what
would be the speeds of the two balls after the collision?

b. If the collision were perfectly elastic, what would
be the speeds of the two balls after the collision?

Question 4)A child’s ball, of mass 250 g, rolls due East along
the ground at 4.2 m/s towards a stationary bowling ball of mass 3.2
kg. After the collision, the bowling ball travels in a direction
32° South of East at 38.7 cm/s.

a. What is the speed of the child’s ball after the
collision?

b. What is the direction in which the child’s ball
travels after the collision?

c. What fraction of the original kinetic energy is
transformed to heat energy?

Answer #1

A ball with mass M = 5 kg is moving with speed V=10 m/s and
collides with another ball with mass m = 2.5 kg which is initially
stationary. There is no other force such as gravity acting on the
two balls. After the collision, both balls move at angle θ=30
degrees relative to initial direction of motion of the ball with
mass M = 5 kg. a) What are the speeds of the two balls after the
collision? b)...

A billiard ball moving at 5.80 m/s strikes a stationary ball of
the same mass. After the collision, the first ball moves at 4.97
m/s, at an angle of 31.0° with respect to the original line of
motion.
(a) Find the velocity (magnitude and direction) of the second
ball after collision.
______ m/s
° (with respect to the original line of motion, include the sign of
your answer; consider the sign of the first ball's angle)(b) Was
the collision inelastic...

A 2,500-kg car moving east at 10.0 m/s collides with a 3,000-kg
car moving north. The cars stick together and move as a unit after
the collision, at an angle of 35.0 degrees north of east and at a
speed of 5.55 m/s. Find the speed of the 3,000-kg car before the
collision.
__________ m/s north

A 1.5 kg metal ball moving east at 50 m/s collides with a
stationary wooden sphere. The ball rebounds at an angle of 45°
north of east and the wooden sphere leaves at 10.0 m/s and at an
angle of 30° south of east. What is the mass of the wooden sphere
and what is the speed of the metal ball after the collision?

A Ping-Pong ball moving East at a speed of 4 m/s collides with a
stationary bowling ball. The Ping-Pong ball bounces back to the
West, and the bowling ball moves very slowly to the East. Which
object experiences the greater magnitude impulse during the
collision?
A car hits another and the two bumpers lock together during the
collision. Is this an elastic or inelastic collision?
In a game of pool, the white cue ball hits the #5 ball and
stops,...

1500-kg car moving at 16.00 m/s suddenly collides with a
stationary car of mass 1000 kg. Time of collision is .02 secs
e. What is the average force acting on the stationary car by the
moving car during the collision?
f. What is the total kinetic energy before the collision?
g. What is the total kinetic energy after the collision?
h. What is change in momentum?
i. What happens to the lost kinetic energy? Explain clearly
j. Is this an...

A 2500 kg car moving east at 10.0 m/s collides with a 3000 kg
car moving north. The cars stick together and move as a unit after
the collision, at an angle of 47.0° north of east and at a speed of
6.66 m/s. Find the velocity of the 3000 kg car before the
collision. m/s north

A 6.00 kg ball, A, moving at velocity 3.00 m/s due east collides
with a 6.00 kg ball, B, at rest. After the collision, A moves off
at 40.0° N of E and ball B moves off at 50.0° S of E. What is the
speed of the balls after the collision?

10. A car with mass 1000 kg travels at 30 m/s, while a second
car with mass 1500 kg travels at 20 m/s. The two cars collide in a
perfectly inelastic collision. What is the final velocity (speed
and direction) if the first car was travelling north and the second
travelling south? If the first car were travelling north and the
second were travelling east?

A 5.0 kg bowling ball traveling 3.0 m/s collides with an 8.0 kg
stationary bowling ball. After the collision the 5.0 kg ball is
deflected to the left from its original path by 30 degrees, while
the 8.0 kg ball is deflected to the right at an angle of 45
degrees. What are the speeds of the two balls after the impact?

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