Force, Motion, and Energy

What is a force?

• A force is a push or pull.

• A force is a measurement of time.

• A force is a form of matter.

• A force is a type of energy.

Name the three types of forces.

• centrifugal force, centripetal force, and frictional force

• magnetic force, electric force, and tension force

• thermal force, mechanical force, and chemical force

• gravitational force, electromagnetic force, and nuclear force

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

• gravity

• external force

• friction

• inertia

According to Newton's second law of motion, what is the formula to calculate force?

• F = ma

• F = m/a

• F = mv

• F = m^2a

What is the unit of force?

• Second

• Newton

• Meter

• Kilogram

What is the difference between potential energy and kinetic energy?

• Potential energy is the energy possessed by an object at rest, while kinetic energy is the energy possessed by an object in motion.

• Potential energy and kinetic energy are the same thing.

• Potential energy is the energy possessed by an object due to its motion, while kinetic energy is the energy possessed by an object due to its position or condition.

• Potential energy is the energy possessed by an object due to its position or condition, while kinetic energy is the energy possessed by an object due to its motion.

Give an example of an object with high potential energy.

• compressed spring

• stretched rubber band

• inflated balloon

• fully charged battery

What is friction?

• Force that has no effect on motion

• Force that causes motion

• Force that supports motion

• Force that opposes motion

Name the four types of friction.

• static friction, sliding friction, rolling friction, fluid friction

• kinetic friction, magnetic friction, air friction, electrical friction

How does friction affect the motion of an object?

• Friction causes the object to move in a straight line.

• Friction has no effect on the motion of an object.

• Friction accelerates the motion of an object.

• Friction opposes the motion of an object.