Unit 3 Retest Review

Front

What is the formula for calculating work done by a force?

Back

W = F d cos θ

Front

How does kinetic energy change when velocity is tripled?

Back

Kinetic energy becomes nine times larger.

Front

What is the relationship between work, power, and time?

Back

Power is the rate at which work is done; if work is done in half the time, power is doubled.

Front

What is the effect of tripling the initial velocity on stopping distance?

Back

It will take nine times the distance to stop.

Front

What is the unit of work in the International System of Units (SI)?

Back

Joule (J)

Front

Define kinetic energy.

Back

Kinetic energy is the energy an object possesses due to its motion, calculated as KE = 1/2 mv².

Front

What is the definition of power in physics?

Back

Power is the rate at which work is done or energy is transferred, measured in watts (W).

Front

How do you calculate the work done when a force is applied at an angle?

Back

Work is calculated using W = F d cos θ, where θ is the angle between the force and the direction of motion.

Front

What happens to the power required if the same work is done in half the time?

Back

The power required is doubled.

Front

What is the relationship between force, mass, and acceleration according to Newton's second law?

Back

F = m a, where F is force, m is mass, and a is acceleration.