Force and Motion

What is the force that opposes the motion of an object?

• Acceleration

• Gravity

• Friction

• Inertia

According to Newton's first law of motion, an object at rest will stay at rest unless acted upon by what?

• internal force

• friction

• external force

• gravity

What is the SI unit of force?

• Meter

• Kilogram

• Newton (N)

• Joule

Which type of force is responsible for keeping planets in orbit around the sun?

• Electrostatic force

• Magnetic force

• Frictional force

• Gravitational force

What is the formula to calculate force?

• Force = Mass - Acceleration

• Force = Mass + Acceleration

• Force = Mass x Acceleration

• Force = Mass / Acceleration

According to Newton's second law of motion, what happens to the acceleration of an object when the force acting on it increases?

• Acceleration becomes negative

• Acceleration increases

• Acceleration decreases

• Acceleration remains constant

What is the force that acts against the force of gravity when an object is moving through something called?

• thrust

• drag

• push

• lift

What is the third law of motion proposed by Newton?

• Reactions precede actions.

• For every action, there is an equal and opposite reaction.

• Every action has an unequal reaction.

• Actions have no reaction.

Which type of force is responsible for the buoyancy of objects in water?

• Lift force

• Friction force

• Gravity force

• Buoyant force

What is the force that occurs when two surfaces are in contact and one object moves over the other?

• Slippery

• Traction

• Adhesion

• Friction