Work, Power and Energy

A lever that has a fulcrum between the load arm and the effort/applied force arm is a?

• First Class Lever

• Second Class Lever

• Third Class Lever

A lever that has a load arm between the fulcrum and the effort arm is a?

• First Class Lever

• Second Class Lever

• Third Class Lever

Which of the following is a true statement about work?

• It measures acceleration

• It measures how quickly an object moves

• It measures how much force is applied over a distance

• It measures how massive an object is

Most simple machines make work easier by?

• Increasing the distance over which force is applied

• Increasing the velocity over which work is done.

• Decreasing the velocity of work.

• Increasing the force needed to do work.

Power is?

• The amount of force needed to do something.

• The amount of work done in a certain amount of time.

• The velocity needed to move an object.

• Work multiplied by time.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Rope, chain or a belt wrapped around a wheel that changes the direction of an applied force is an example of a?

• Class 1 lever.

• Pulley

• Wedge

• Class 3 Lever

If 200 joules of work was done top move an object with a force of 50 N, how far was the object moved?

• 2 meters

• 4 meters

• 45 meters

• 150 meters

What is the metric unit for work?

• Meters

• Joules

• Miles

• Watts

Tags

NGSS.MS-PS3-5

What is the metric unit for power?

• Meters

• Joules

• Miles

• Watts

Which would be an example of a second class lever?

• Scissors

• Screwdriver

• Wheelbarrow

• Screw