#1
What is the SI unit of impulse?
Newton-second
ExplanationImpulse is measured in Newton-seconds.
#2
Which of the following is a scalar quantity?
Impulse
ExplanationImpulse is a scalar quantity.
#3
If the mass of an object is doubled, and its velocity is halved, how does the momentum change?
Remains the same
ExplanationMomentum remains the same when mass is doubled and velocity is halved.
#4
Which of the following is a statement of the law of conservation of momentum?
The total momentum of an isolated system is constant.
ExplanationMomentum in an isolated system remains constant.
#5
In an isolated system, if no external forces act, what happens to the total momentum?
Remains constant
ExplanationTotal momentum remains constant in the absence of external forces.
#6
Which type of collision conserves both kinetic energy and momentum?
Perfectly elastic
ExplanationPerfectly elastic collisions conserve kinetic energy and momentum.
#7
What is the relationship between impulse and change in momentum?
Impulse = Change in Momentum
ExplanationImpulse equals the change in momentum.
#8
In a collision, if two objects stick together after the impact, what type of collision is it?
Perfectly inelastic
ExplanationCollisions where objects stick together are perfectly inelastic.
#9
What is the area under a force-time graph equal to in terms of impulse?
Impulse
ExplanationThe area under a force-time graph represents impulse.
#10
What is the formula for impulse?
Impulse = Force × Time
ExplanationImpulse is calculated as force multiplied by time.
#11
If the net external force acting on a system is zero, what can be said about the total momentum of the system?
It is constant
ExplanationTotal momentum remains constant with zero net external force.
#12
If the force acting on an object is constant, how is impulse related to the change in momentum?
Impulse is equal to the change in momentum
ExplanationImpulse is equal to the change in momentum with constant force.
#13
Which of the following is a valid statement regarding the conservation of momentum in a collision?
The total momentum of an isolated system is conserved.
ExplanationTotal momentum in an isolated system is conserved during collisions.
#14
In a collision, if the two objects rebound off each other with no deformation and no generation of heat, what type of collision is it?
Perfectly elastic
ExplanationCollisions with no deformation and no heat generation are perfectly elastic.
#15
If an object experiences a constant force for a longer duration, what happens to the impulse?
Increases
ExplanationImpulse increases with longer duration of constant force.