Question

One car has one and a half times the mass of a second car, but
only half as much kinetic energy. When both cars increase their
speed by 6.5 m/s, they then have the same kinetic energy. What were
the original speeds of the two cars?

Answer #1

The first car has twice the mass of a second car, but only half
as much kinetic energy. When both cars increase their speed by 12
m/s m/s , they then have the same kinetic energy. Part A What were
the original speeds of the two cars?

A father racing his son has one-third the kinetic energy of the
son, who has one-third the mass of the father. The father speeds up
by 1.6 m/s and then has the same kinetic energy as the son.
(a) What is the original speed of the father?
m/s
(b) What is the original speed of the son?
m/s

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 β 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

In an elastic collision, a 480-kg bumper car collides directly
from behind with a second, identical bumper car that is traveling
in the same direction. The initial speed of the leading bumper car
is 4.5 m/s and that of the trailing car is 7.2 m/s.
Hint
Assuming that the mass of the drivers is much, much less than
that of the bumper cars, what are their final speeds?
The speed of the leading bumper car after collision
is m/s, and the...

A train car with mass m1 = 550 kg is moving to the
right with a speed of v1 = 8.5 m/s and collides with a
second train car. The two cars latch together during the collision
and then move off to the right at vf = 5.2 m/s.
What is the mass of the second train car? kg Submit 3) What is
the change in kinetic energy of the two train system during 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?

1. A 8600kg boxcar is traveling at 12 m/s strikes a second
boxcar of mass 7900 kg moving in the same direction. The two stick
together and move off with a speed of 5.25 m/s. What was the
original speed of the second boxcar? Explain your reasoning.
2. How much kinetic energy was lost in the collision?

A bumper car with mass m1 = 114 kg is moving to the
right with a velocity of v1 = 4.7 m/s. A second bumper
car with mass m2 = 94 kg is moving to the left with a
velocity of v2 = -3.7 m/s. The two cars have an elastic
collision. Assume the surface is frictionless.
1)What is the velocity of the center of mass of the system?
2)What is the initial velocity of car 1 in the center-of-mass...

Two cars collide at an icy intersection and stick together
afterward. The first car has a mass of 1050 kg and was approaching
at 9.00 m/s due south. The second car has a mass of 800 kg and was
approaching at 20.0 m/s due west.
(a) Calculate the final velocity of the cars. (Note that since
both cars have an initial velocity, you cannot use the equations
for conservation of momentum along the x-axis and y-axis; instead,
you must look...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 minute ago

asked 3 minutes ago

asked 4 minutes ago

asked 6 minutes ago

asked 9 minutes ago

asked 13 minutes ago

asked 13 minutes ago

asked 14 minutes ago

asked 15 minutes ago

asked 16 minutes ago

asked 16 minutes ago

asked 18 minutes ago