Unit 4: Momentum, Impulse, Conservation, Collisions

Front

What does momentum depend on?

Back

Momentum depends on an object's mass and velocity.

Front

What is the formula for calculating momentum?

Back

Momentum (p) = mass (m) × velocity (v)

Front

What is impulse?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time.

Front

What is the relationship between impulse and momentum?

Back

Impulse is equal to the change in momentum: Impulse = Δp = p_final - p_initial.

Front

What type of collision conserves kinetic energy?

Back

An elastic collision conserves kinetic energy.

Front

What type of collision does not conserve kinetic energy?

Back

An inelastic collision does not conserve kinetic energy.

Front

What is a completely inelastic collision?

Back

A completely inelastic collision is one where the colliding objects stick together after the collision.

Front

How do you calculate the final velocity of two objects after a completely inelastic collision?

Back

Use the conservation of momentum: m1*v1_initial + m2*v2_initial = (m1 + m2)*v_final.

Front

What is the momentum of a 75 kg biker moving at 5 m/s?

Back

The momentum is 375 kg m/s.

Front

If a 0.5 kg sphere experiences a change in momentum of 1 kg m/s, what is the impulse?

Back

The impulse is also 1 kg m/s.