Name ___________________________________ period _______ date _______
Name ___________________________________
Name ___________________________________
Name ___________________________________
Momentum and Collisions 1-7-2016
SHOW ALL FORMULAS AND CALCULATIONS ON A SEPARATE
SHEET OF PAPER AND STAPLE TO THIS HANDOUT
mi1 vi1 + mi2 vi2 = mf1 vf1 + mf2 vf2
mi1 vi1 + mi2 vi2 = (mf1 + mf2 ) vf
1.
A boy and girl on ice skates face each other. The girl has a mass of 20 kg and
the boy has a mass of 30 kg. The boy pushes the girl backward at a speed of 3.0
m/s. As a result of the push, the speed of the boy is
a. Type of Collision= __________________________
b. Speed of the boy= ___________________________
2.
Two cars of equal mass collide on a horizontal frictionless surface. Before the
collision, car A is at rest while car B has a constant velocity of 12 m/s. After the
collision, the two bodies are stuck together. What is the speed of the composite
body (A + B) after the collision?
a. Type of Collision= __________________________
b. Velocity of (A+B) = ___________________________
3.
Two ice skaters push off against one another starting from a stationary
position. The 45-kg skater acquires a velocity of 0.375 m/s to the right. What
velocity does the 60-kg skater acquire?
a. Type of Collision=
__________________________
b. Velocity of the 60kg skater=
___________________________
4.
A 0.60-kg glider traveling at 8.0 m/s on a level air track undergoes a head-on
collision with a 0.20-kg mass traveling toward it at 4.0 m/s. The two gliders stick in
the collision. What is the velocity of the combined gliders after the collision?
a. Type of Collision=
__________________________
b. Velocity of the combined gliders=
___________________________
5.
A glider with mass (m) of 100kg and speed 18.0m/s moving along an air track
collides with a stationary cart with a mass m/3. After the collision the first cart has a
speed v/2. What is the velocity of the second cart?
a.
Type of Collision=
__________________________
b.
Velocity of the second cart=
___________________________
6. Two carts with masses of 4 kg and 3 kg move toward each other on a
frictionless track with speeds of 5.0 m/s and 4.0 m/s respectively. The carts
stick together after the colliding head on. Find the final speed of the carts.
a. Type of Collision= __________________________
b. vf= ___________________ m/s
7. An average player hitting a forehand shot on a ball approaching at 30 m/s can
deliver an impulse of 5.13 kg m/s on a tennis ball of mass 57 grams. With
what speed would the ball leave the racket in this situation?
a. Type of Collision= __________________________
b. vf= ___________________ m/s
8. A 10 gram bullet is shot from a 500 gram gun at a speed of 230 m/s. Find the
speed and kinetic energy of the bullet and the gun. Assume that the
momentum and energy of the escaping gasses are negligible.
a. Type of Collision= __________________________
b. vf= ___________________ m/s
9. Two carts with masses of 4 kg and 3 kg move toward each other on a
frictionless track with speeds of 5.0 m/s and 4.0 m/s respectively. The carts
stick together after the colliding head on. Find the final speed of the carts.
a. Type of Collision= __________________________
b. vf= ___________________ m/s