Momentum

Front

What is momentum?

Back

Momentum is the quantity of motion an object has, calculated as the product of its mass and velocity.

Front

What is the formula for calculating momentum?

Back

Momentum (p) = Mass (m) × Velocity (v)

Front

What does it mean for momentum to be conserved?

Back

The total momentum of a closed system remains constant unless acted upon by external forces.

Front

True or False: The total momentum of a group of objects changes when no outside forces act on them.

Back

True

Front

True or False: Momentum is described by both a direction and a force.

Back

False, momentum is described by both a direction and a magnitude.

Front

True or False: A heavier object moving at the same speed has more momentum than a lighter object.

Back

True

Front

Which has more momentum: a 1000-kg vehicle at 25 m/s or a 500-kg vehicle at 50 m/s?

Back

The 1000-kg vehicle has more momentum (p = 1000 kg × 25 m/s = 25000 kg·m/s) than the 500-kg vehicle (p = 500 kg × 50 m/s = 25000 kg·m/s). They are equal.

Front

What is the unit of momentum?

Back

The unit of momentum is kilogram meter per second (kg·m/s).

Front

True or False: Newton referred to momentum as 'quantity of motion.'

Back

True

Front

Which object would be hardest to stop if moving at the same speed: a car, a fire engine, a Frisbee, or a stroller?

Back

A fire engine.