Physics Concepts Quiz

What is the formula for momentum?

• m - v

• m * v

• m / v

• m + v

In a system with no external forces, what happens to the total momentum?

• It increases

• It decreases

• It is conserved

• It becomes zero

What is impulse equal to in terms of force and time?

• Force plus time

• Force minus time

• Force multiplied by time

• Force divided by time

How is impulse related to momentum?

• Impulse is the change in momentum

• Impulse is the square of momentum

• Impulse is unrelated to momentum

• Impulse is half of momentum

What does the area under a force-time graph represent?

• Impulse

• Acceleration

• Displacement

• Velocity

What is a necessary condition for a collision to be elastic?

• Kinetic energy must be lost

• Objects must bounce off each other

• Momentum must not be conserved

• Objects must stick together

In an inelastic collision, what happens to the kinetic energy?

• It is doubled

• It is conserved

• It is increased

• It is transformed into thermal energy

What is the center of mass of a system?

• The point where the system would balance

• The point where the system's mass is zero

• The point where the system's force is minimum

• The point where the system's velocity is maximum

How does the center of mass behave in the absence of external forces?

• It moves in a circular path

• It remains at rest or moves at constant velocity

• It accelerates

• It oscillates

What happens to the center of mass if a system is at rest and no external forces act on it?

• It moves to the left

• It remains at rest

• It accelerates upwards

• It moves to the right