Unit 1 Applied Physics Quiz

What is the SI unit of force?

• kilogram (kg)

• newton (N)

• joule (J)

• meter (m)

State Newton's first law of motion.

• An object at rest will start moving on its own

• An object in motion will eventually come to a stop

• An object in motion will change direction without any external force

• An object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Define the term 'work' in physics.

• The amount of energy required to move an object

• The product of the force applied to an object and the distance over which the force is applied.

• The speed at which an object moves

• The force exerted on an object

Explain the concept of power in physics.

• Power in physics is the rate at which work is done or the rate at which energy is transferred or converted.

• Power in physics is the speed of an object in motion

• Power in physics is the ability to lift heavy objects

• Power in physics is the force of gravity on an object

What is the formula to calculate kinetic energy?

• KE = 0.5 * m * v^2

• KE = m + v^2

• KE = m * v^2

• KE = 0.5 * m * v

Define the term 'momentum' in physics.

• The distance traveled by an object

• The force exerted by an object

• The temperature of an object

• The product of an object's mass and its velocity.

Explain the difference between mass and weight.

• Mass is measured in pounds, while weight is measured in kilograms.

• Mass and weight are the same thing.

• Mass is the amount of matter in an object, while weight is the force exerted on an object due to gravity.

• Mass is the force exerted on an object, while weight is the amount of matter in an object.

State the law of conservation of energy.

• Energy can be created out of nothing

• Energy can be destroyed completely

• Energy can only be transformed into matter

• Energy cannot be created or destroyed, only transformed from one form to another.

What is the formula to calculate gravitational potential energy?

• mgh

• mg/h

• mgh^2

• mgh + 2

Explain the concept of friction in physics.

• Friction is the force that increases the relative motion of two surfaces in contact.

• Friction is the force that causes objects to attract each other.

• Friction is the force that opposes the relative motion or tendency of such motion of two surfaces in contact.

• Friction is the force that has no effect on the motion of objects.