Unit 3: Work & Energy Review

Match the following terms with the correct equation.

• Kinetic Energy

• Work-Energy Theorem

• Conservation of Energy

• Gravitational Potential Energy

• Mechanical Energy

Match the following

• the sum of kinetic & potential energy

• Energy

• energy of motion

• Potential Energy

• the ability to do work

• Kinetic Energy

• energy from position/shape/ config.

• Mechanical Energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Work requires two things:

(Select two answers)

• Any force acting on an object

• Displacement of an object

• A force with a component in the same or opposite direction of motion

• A force perpendicular to the displacement of an object

• A displaced object moving with a constant velocity

Tags

NGSS.HS-PS3-1

The following describes the Work-Energy Theorem:
(Select all that apply)

• The net work done on an object is equal to its change in kinetic energy

What equation do you use to find the velocity of an object given its kinetic energy?

Tags

NGSS.HS-PS3-1

What is power?
(Select all that apply)

• The rate at which work is done

• Measured in Watts (W)

A force, F=240N, is applied to a sled of mass, m=57 kg, pushing at an angle, θ=30^o to the horizontal. The force of friction is F_f=30 N. If the sled moves a distance 90 m along a flat surface, what is the work done by the applied force on the box?

• 18,700 J

• 21,600 J

• 18,900 J

• 50,300 J

Tags

NGSS.HS-PS2-1

NGSS.HS-PS3-1

A force, F=240N, is applied to a sled of mass, m=57 kg, pushing at an angle, θ=30^o to the horizontal. The force of friction is F_f=30 N. If the sled moves a distance 90 m along a flat surface, what is the work done by the friction force on the box?

• • -2,700 J

• 2,700 J

• -25,100 J

• 50,300 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

A force, F=240N, is applied to a sled of mass, m=57 kg, pushing at an angle, θ=30^o to the horizontal. The force of friction is F_f=30 N. If the sled moves a distance 90 m along a flat surface, what is the total work done on the box?

• • 16,000 J

• 2,700 J

• 1,8700 J

• 0 J

Tags

NGSS.HS-PS3-1

What is the net work done on an elevator that is accelerated upward at 4.2 m/s² through a distance of 20 m? The total mass of the elevator and its 8 passengers is 1,200 kg .

• 235,200 J

• 100,800 J

• 336,000 J

• 0 J

• -100,800 J

Tags

NGSS.HS-PS2-1