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Which of the following is an example of an explosion that demonstrates the principle of conservation of momentum?

A firecracker exploding.

A ball bouncing off a floor.

A rocket launching.

A car crashing into a wall.

Which statement is true about momentum in a closed system?

It is not conserved in inelastic collisions.

It is always conserved in all types of collisions.

It remains constant only in elastic collisions.

It is conserved when external forces are present.

What is the definition of linear momentum?

The product of velocity and time.

The product of mass and acceleration.

The product of velocity and force.

The product of mass and velocity.

A 50 kg astronaut is floating in space and pushes a 2000 kg satellite. What will happen to the astronaut?

The astronaut will move in the same direction as the push.

The astronaut will remain stationary.

The astronaut will move faster than the satellite.

The astronaut will move in the opposite direction.

If two ice skaters push off from each other, what happens to their total momentum?

It increases.

It decreases.

It remains the same.

It becomes zero.