Work, Power, & Energy

a ball on the top of a building has this type of ENERGY

• Electrical

• Sound

• Thermal

• Gravitational Potential Energy

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 

• 77 J

• 7.7 J 

• 0.7 J 

• 770 J 

Tags

NGSS.MS-PS2-2

• Potential Energy
• Kinetic Energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

A 50N block is lifted 10 m. How much work was done?

• 50000 J

• 5000 J

• 500 J

• 50 J

The rate (how fast) at which work is being done.

• Power

• Joules

• Work

• Newton

• No choice is correct

The rate at which work is done.

• power

• force

• inertia

• energy

The units for power.

• Watts

• Power

• Joules

• Work

• No choice is correct

If 150 Joules of work is needed to move a box 10 meters, what force was used? 

• 1500 N

• 15 N

• 1.5 N

• 150 N

How can simple machines make work easier?

• by decreasing the force needed to complete the task

• by increasing the friction between the machine and the object

• by adding more work on the object than originally applied

• by removing the force of gravity on the object

Tags

NGSS.MS-PS2-2

A car speaker is an example of this type of ENERGY

• Thermal

• Nuclear

• Elastic

• Sound

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2