Question

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 elastic or inelastic collision? Explain clearly

Answer #1

A ball with mass of 0.025 kg is thrown horizontally with
velocity of 1.5 m/s toward a wall in positive X direction. It
collides with the wall, then bounces back to the left with velocity
of 1.0 m. The Collison takes 0.015s.
What is the total initial momentum?
b) What is the total final momentum?
c)What is change in momentum?
d)What is the impulse?
e) What is the average force acting on the wall by the ball
during the collision?...

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...

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 1.5 kg car (1) initially moving at 4.0 m/s to the right
collides with a 2.0 kg car (2) initially moving at 2.0 m/s to the
left. After the inelastic collision, car 1 is moving to the left at
1.2 m/s
A) What is the velocity and direction of car 2 after the
collision?
B) What is the change in total kinetic energy and the percentage
of initial kinetic energy remaining after the collision?

A 4.34-kg toy car with a speed of 4.13 m/s collides with a
stationary 1.00-kg car. After the collision, the cars are locked
together with a speed of 3.6 m/s. How much kinetic energy is lost
in this collision?

A railroad car of mass 3.00 ? 104 kg moving at 3.00
m/s collides and couples with two coupled railroad cars, each of
the same mass as the single car and moving in the same direction at
1.20 m/s.
(a) What is the speed of the three coupled cars after the
collision?
_______ m/s
(b) How much kinetic energy is lost in the collision?
_______ J

A railroad car of mass 2.70 ✕ 104 kg moving at 3.50
m/s collides and couples with two coupled railroad cars, each of
the same mass as the single car and moving in the same direction at
1.20 m/s.
(a) What is the speed of the three coupled cars after the
collision?
m/s
(b) How much kinetic energy is lost in the collision?
J

A railroad car of mass 2.55 ✕ 104 kg moving at 3.25
m/s collides and couples with two coupled railroad cars, each of
the same mass as the single car and moving in the same direction at
1.20 m/s.
(a) What is the speed of the three coupled cars after the
collision?
m/s
(b) How much kinetic energy is lost in the collision?
J

A railroad car of mass 2.90 ? 104 kg moving at 3.05 m/s collides
and couples with two coupled railroad cars, each of the same mass
as the single car and moving in the same direction at 1.20 m/s. (a)
What is the speed of the three coupled cars after the collision?
m/s (b) How much kinetic energy is lost in the collision? J

a
1.2 kg ball moving with a velocity of 8.0m/s collides head on with
a stationary ball and bounces back at a velocity or 4.0 m/s. If the
collision is perfectly elastic, calculate (a) the mass of the other
ball (b) the velocity of the other ball after the collision (c) the
momentum of each ball before and after the collision (d) the
kinetic energy of each ball before and after the collision

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