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Physics 2nd Q Exam
Test Description: Momentum
Instructions: Answer all questions to get your test result.
1) A hotwheel car collides with an identical car that is stationary in an elastic head-on collision. After the collision, which of the following is true of the first car?
A
it comes to a rest
B
it maintains its velocity
C
it doubles its velocity
D
it moves in the opposite direction
2) Two balls made of metal collide and move away from each other with the same speed. Identify the type of collision.
A
elastic
B
a teensy bit elastic
C
a smidgen inelastic
D
inelastic
3) In a collision between two objects,
A
both momentum and kinetic energy is conserved in all types of collisions
B
kinetic energy is always conserved
C
neither momentum or kinetic energy is conserved
D
momentum is always conserved
4) Two objects stick together and move away with a single velocity after colliding. Identify the type of collision.
A
a bit inelastic
B
kinda elastic
C
inelastic
D
elastic
5) Conservation of momentum states that momentum is conserved in a system as long as there are no outside______________affecting the system.
A
forces
B
velocities
C
acceleration
D
energy
6) an elephant runs and collides with a tree and stops. the momentum of the elephant
A
stays the same
B
decreases
C
increases
D
is conserved
7) A 0.500kg football is thrown with a velocity of 15.0m/s to the right. A stationary receiver catches the ball and brings it to a rest in 0.0200s. What is the force exerted on the ball by the receiver?
A
7.50N to the left
B
56.3N to the left
C
375N to the left
D
0.150N to the left
8) the product of the force applied to the object and the time interval is also known as
A
newton's 2nd law
B
impulse
C
inertia
D
conservation of energy
9) Find the momentum of a lion with a mass of 91kg moving at a velocity of 6.7m/s
A
13.6kg*m/s
B
14kg*m/s
C
610kg*m/s
D
0.074kg*m/s
10) a roller coaster goes down a hill at 25m/s then up the hill at 6m/s. the momentum of the roller coaster
A
is zero at all points in the ride
B
is greater down the hill
C
is greater up the hill
D
never changes
*select an answer for all questions
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