Laws of Motion

What is a force?

• A push or a pull

• The constant motion of an object

• The acceleration of an object

• The mass of an object

Which of these is evidence that an unbalanced force is acting on an object?

• The mass of the object is changing

• The object continues moving in a straight line

• The object remains at rest

• The motion of the object is changing

Newton's First Law States........

• Objects at rest tend to stay at rest unless acted on by an outside force.

• Objects accelerate often and it is difficult to know when or how they will accelerate.

• Objects in motion tend to stay in motion unless acted on by an outside force.

• Both A & C

What is inertia?

• An object that is accelerating

• Gravitational force

• An objects tendency to stay at rest or in motion

• An unbalanced force

Inertia depends on __________.

• Weight

• Velocity

• Mass

• Acceleration

Newton's second law states.....

• If there is more mass then there is more acceleration

• An object at rest wants to be in motion

• Force = Mass x Acceleration

• The force exerted on an object is not related to mass or acceleration

What formula is used to calculate force?

• Acceleration = Force x Mass

• Force = Mass x Acceleration

• Work = Force x Distance

• Mass = Force + Acceleration

An object with a mass of 100 kg is observed to accelerate at the rate of 5 m/s2. Calculate the force required to produce this acceleration.

• 20N

• 500 M/S

• 500 Kg

• 500N

A force of 40 N acts upon a 2 kg block. Calculate the acceleration of the object.

• 20 m/s²

• 20 m/s

• 80 m/s²

• 80 m/s

Newton's third law states.......

• For each action there is a larger reaction associated with it.

• None of these choices

• For each action there is an equal and opposite reaction.

• For each action there is a smaller reaction associated with it.