Newton's Laws of Motion

What is the SI unit for momentum?

• kg/s²

• kg x m/s²

• kg x s/m

• kg x m/s

If you apply 10 N of force to a 10-kg object, what will be the object's acceleration?

• 10 m/s²

• 10 N/kg

• 1 m/s²

• 1 kg/N

The inertia of an object depends on its

• mass

• speed

• velocity

• direction

Inertia causes a moving object to

• keep moving

• stop moving

• slow down

• speed up

An object at rest will stay at rest as long as the net force acting on it is

• positive

• strong

• stable

• zero

The momentum of a 50-kg object moving at a velocity of 2 m/s is

• 100 kg x m/s

• 50 kg x m/s

• 25 kg x m/s

• 2 kg x m/s

Which statement about momentum is false?

• Momentum is a force

• Momentum may be transferred

• Momentum is always conserved

• Momentum is a property only of moving objects

An object has greater momentum if it has (choose all that apply)

• smaller size

• greater mass

• greater velocity

• less mass

• less velocity

Action and reaction forces are not balanced because they

• are unequal in strength

• act in the same direction

• act on different objects

• cancel each other out

What happens when a boater pushes against the water with an oar? (Select 2)

• the water pushes back

• the boat moves in the opposite direction

• The oar moves the boat

• the boat moves in the same direction

• nothing happens to the motion of the boat