1. Which of Newton’s laws of motion states that an object at rest stays at rest and an object in motion stays in motion with the same speed and the same direction unless acted upon by an unbalanced force?
A. Newton's Third Law of Motion
B. Newton's Second Law of Motion
C. Newton's First Law of Motion
D. Newton's Fourth Law of Motion
2. Which is always true in a closed system?
A. Velocity is constant.
B. Mass is not conserved.
C. Momentum is conserved.
D. Acceleration is not constant.
3. Which is not an example of an external force acting on an object?
A. a batter hitting a baseball
B. a billard ball bouncing off the rail of a pool table
C. a meteor traveling unhindered through space
D. a hockey puck striking the back of the net and coming to rest
4. Which phrase best defines momentum?
A. the change in velocity of an object over time
B. the amount of matter in an object
C. the distance traveled by and object over time
D. the motion of an object
5. Which is an example of an object with a momentum of zero?
A. an empty canoe sitting on the bank of a river
B. a puck sliding across the top of an air hockey table
C. a swimmer diving off the starting block
D. a car rolling down a hill
Physics U4 L4 Conservation of Momentum
1. A, Newton’s first law of motion
2. B, Momentum is conserved.
3. B, inertia
4. B, the motion of an object
5. C, an empty canoe sitting unmoving on the bank of a river
Damon you are borderline useless.
Søft Angel is 100% right
real answers for momentum quick check november 2021
1. 3 kg • m/s
2. it has a change in momentum equal to that of the rock, in the opposite direction
3. newton’s first law of motion
4. momentum is conserved