Momentum and Collisions

What is impulse in the context of momentum and collisions?

• Impulse is the change in momentum of an object, calculated by multiplying the force applied to the object by the time over which the force is applied.

• Impulse is the energy lost during a collision

• Impulse is the distance traveled by an object during a collision

• Impulse is the speed of an object after a collision

State the principle of conservation of momentum.

• Momentum decreases with time

• Momentum is dependent on the mass of the object

• Momentum is only conserved in linear motion

• Total momentum of a closed system remains constant if no external forces are acting on it.

Explain the concept of inelastic collisions.

• Inelastic collisions involve the gain of kinetic energy.

• Inelastic collisions result in objects bouncing off each other with no energy loss.

• Inelastic collisions only occur in a vacuum.

• Inelastic collisions involve the loss of kinetic energy and the objects stick together after the collision.

Define perfectly inelastic collisions.

• Two objects stick together after colliding and move as one mass.

• The objects pass through each other without interacting

• Objects repel each other after colliding

• The objects bounce off each other after colliding

How is impulse related to the change in momentum?

• Impulse is greater than the change in momentum.

• Impulse is unrelated to the change in momentum.

• Impulse is equal to the change in momentum.

• Impulse is less than the change in momentum.

In a closed system, what remains constant before and after a collision?

• Net force

• Total momentum

• Kinetic energy

• Total energy

Differentiate between inelastic and elastic collisions.

• In an inelastic collision, kinetic energy is not conserved, and the objects stick together after the collision. In an elastic collision, kinetic energy is conserved, and the objects bounce off each other after the collision.

• In an inelastic collision, objects repel each other after the collision.

• In an elastic collision, kinetic energy is not conserved, and the objects bounce off each other after the collision.

• In an inelastic collision, kinetic energy is conserved, and the objects stick together after the collision.

What happens to kinetic energy in a perfectly inelastic collision?

• Kinetic energy is not conserved and is converted into other forms of energy.

• Kinetic energy is doubled

• Kinetic energy is converted into potential energy

• Kinetic energy remains the same

Calculate the final velocity of two objects after an inelastic collision given their masses and initial velocities.

• final velocity = (m1*v1 - m2*v2) / (m1 + m2)

• final velocity = (m1*v1 - m2*v2) / (m1 - m2)

• final velocity = (m1*v1 + m2*v2) / (m1 - m2)

• final velocity = (m1*v1 + m2*v2) / (m1 + m2)

Discuss the real-life applications of momentum and collisions.

• Momentum and collisions are crucial in designing safer cars, sports equipment, studying particle interactions, and analyzing the effects of moving objects.

• Momentum and collisions are only studied in theoretical physics.

• Momentum and collisions have no practical applications in real life.

• Momentum and collisions are only relevant in video games.