AP Physics C Review Mech 3

Work Energy Theorem

100

Work is the product of these two quantities.

What is force and displacement?

200

Work has this sign when force is opposite of displacement.

What is negative?

300

This equation represents kinetic energy in terms of mass and velocity. 

What is k= (1/2)mv² ?

400

Energy is being transferred into a system when work has this sign.

What is positive?

500

The net amount of work done on an object equals that of the object's change in what quantity.

What is kinetic energy?

Forces and Potential Energy

100

These two quantities added up equal mechanical energy.

What is kinetic energy and potential energy?

200

The work done by a conservative force as an object moves from one point to another stays the same regardless of the ____.

What is the path?

300

This conservative force is solved for using the equation F=kx.

What is spring force?

400

This equation, containing a derivative, relates force and potential energy.

What is F= -dU/dx?

500

This quadratic potential energy function is used for springs 

What is U_s=(1/2)kx² ?

Conservation of Energy

100

This type of system is a set of objects that interact only with each other but not with the rest of the universe.

What is an isolated system?

200

This formula relates gravitational force and potential energy. 

What is Potential Energy= mgh?

300

This law can be written in this format: 

E_total= K+U_g+U_s+E_thermal

What is the Law of Conversation of Energy?

400

This quantity equals K+U_g+U_s

What is Mechanical Energy?

500

This is the final equation for conservation of energy when a ball is being dropped from the air.

What is mgh= (1/2)mv² ?

Power

100

Power is defined as the rate at which this quantity is being done by a force.

What is work?

200

This quantity, or unit, is resembled through the equation J/s

What is a Watt?

300

Power is the time derivative of these two quantities

What is work and energy?

P= dW/dt

P= dE/dt

400

This equation can be used to solve for power when velocity is constant and force is parallel to velocity

What is P=Fv?

500

This method would be used to find work given that P= dW/dt

What is integration?

Practice Problems (math)

100

The kinetic energy for an object with mass 3 kg and velocity 2 m/s is this value. 

What is 6 J?

200

When P= at² with a being constant, this expression would equal the work.

What is W=aT³/3?

300

The spring constant of a spring that has a force of 50 N and a stretching distance of 0.70 meters is this value.

What is 71.43 N/m?

400

For a spring, the potential energy function equals this when the force equals F= -6000x²

What is 2000x³ ?

500

A ball of mass 5 kg is dropped from rest at 2 m and free falls. Using conservation of energy, the velocity is this value. 

What is the square root of 40 m/s?