_11) Linear Momentum

Front

What is the equation to calculate momentum?

Back

p = mv, where p is momentum, m is mass, and v is velocity.

Front

How can a tennis ball and a bowling ball have the same momentum?

Back

They can have different speeds; the momentum is the product of mass and velocity.

Front

What does the Law of Conservation of Momentum state?

Back

The total momentum before a collision is equal to the total momentum after a collision.

Front

What is impulse?

Back

Impulse is the change in momentum, calculated as the product of force and the time duration over which the force acts.

Front

How is impulse related to momentum?

Back

Impulse is equal to the change in momentum of an object.

Front

What is the formula for calculating impulse?

Back

Impulse (J) = Force (F) × Time (t) or J = Δp (change in momentum).

Front

If a 0.2 kg ball is thrown with a velocity of 15 m/s, what is the momentum?

Back

Momentum = mass × velocity = 0.2 kg × 15 m/s = 3 kg·m/s.

Front

What happens to momentum in a perfectly elastic collision?

Back

Both momentum and kinetic energy are conserved.

Front

What happens to momentum in an inelastic collision?

Back

Momentum is conserved, but kinetic energy is not conserved.

Front

What is the difference between elastic and inelastic collisions?

Back

In elastic collisions, both momentum and kinetic energy are conserved; in inelastic collisions, only momentum is conserved.