#1
Which of the following equations represents Newton's second law of motion?
F = ma
ExplanationForce equals mass times acceleration.
#2
What is the momentum of an object with a mass of 5 kg and a velocity of 10 m/s?
15 kg m/s
ExplanationMomentum is the product of mass and velocity.
#3
Which of the following quantities is a vector?
Velocity
ExplanationVectors have both magnitude and direction.
#4
What is the momentum of a stationary object?
Zero
ExplanationMomentum of a stationary object is zero.
#5
What is the unit of impulse?
Newton-second (Ns)
ExplanationImpulse is measured in Newton-seconds.
#6
A 500 g object is moving with a velocity of 10 m/s. What is its momentum?
50 kg m/s
ExplanationMomentum is mass times velocity.
#7
Which of the following statements is true regarding the conservation of momentum?
Momentum is conserved in both elastic and inelastic collisions.
ExplanationMomentum remains constant in collisions.
#8
A force of 20 N is applied to an object with a mass of 4 kg. What is the resulting acceleration of the object?
5 m/s^2
ExplanationAcceleration is the result of force acting on mass.
#9
What is the impulse experienced by an object when a force of 50 N is applied for 2 seconds?
100 Ns
ExplanationImpulse is force multiplied by time.
#10
Which of the following is NOT a unit of momentum?
Joule
ExplanationMomentum is not measured in Joules.
#11
Which of the following equations represents impulse-momentum theorem?
F = Δp/Δt
ExplanationImpulse is the change in momentum over time.
#12
What happens to the momentum of a system if the net external force acting on it is zero?
Momentum remains constant
ExplanationMomentum is conserved in the absence of external forces.
#13
In a closed system, two objects collide. If one object experiences a force of 10 N due to the collision, what is the force experienced by the other object?
10 N
ExplanationAction and reaction forces are equal and opposite.
#14
What is the change in momentum of an object if it experiences an impulse of 100 Ns?
It cannot be determined without additional information.
ExplanationChange in momentum depends on the initial and final momentum.
#15
Which of the following statements correctly describes an elastic collision?
Total mechanical energy is conserved.
ExplanationIn elastic collisions, kinetic energy is conserved.
#16
Which of the following statements about momentum is true?
Momentum depends on the frame of reference.
ExplanationMomentum is relative to the observer's frame.
#17
Which of the following statements about elastic collisions is true?
Total mechanical energy is conserved.
ExplanationIn elastic collisions, kinetic energy is conserved.