Quiz No.1 (Laws of Motion)

Forces come in ___________ ___________ force pairs.

• action, reaction

• acting lessons

• action, cut

• chemical reaction

When a hammer exerts a force on the nail, the nail _________________________________________.

• exerts a smaller amount of force back onto the hammer

• exerts a larger amount of force back onto the hammer

• exerts the same amount of force back onto the hammer

• cries and cries and cries

The first law of motion states that objects at rest will stay at rest unless acted upon by an unbalanced:

• motion

• force

• inertia

• acceleration

Friction and air resistance are forces that:

• can make an object slow down or stop

• pulls an object toward the center of Earth

• changes an object's position

• can't be described

A 20 kg bike accelerates at 10 m/s². What was the force?

• 25 Newtons

• 20 Newtons

• 200 Newtons

• 10 Newtons

when force remains the same but the object becomes heavier, what will happen to its acceleration?

• remains the same

• it will have higher acceleration

• it will have lower acceleration

• the object will become heavier

when force remains the same but the object becomes lighter, what will happen to its acceleration?

• unchanged

• acceleration will decrease

• the force will increase

• acceleration will increase

acceleration is ______ proportional to the force applied.

• inversely

• directly

acceleration is ______ proportional to the mass of an object.

• inversely

• directly

What pulls a ball back to earth?

• Gas

• Gravity

• Friction

• Molecules