CBA #2: Work, Power & Energy Review

Power can be determined with the following except...

• Force

• Frequency

• Velocity

• Work

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

The watt is equivalent to ...

• N.m

• J/s

• J

• Hp

Power is the ______ at which work is done

• Displacement

• Force

• Rate

• Angle

What is the SI unit for power?

• N.m

• J

• W

• Hp

How can work be negative?

• If the force and displacement are in the same direction

• If force and displacement are perpendicular

• If the force of gravity is on an incline

• If the force and displacement are in opposite directions

In which if the following scenarios is no work done?

• A child picks up a toy

• A student holds a stack of books

• A crane lowers a large steel beam to the ground

• A cat jumps up on a couch

Theta is the angle that forms between the force and ...

• Displacement

• Radius

• Time

• Velocity

What is the SI unit for work?

• Newtons

• Joules

• Watts

• Meters

If a powerlifter raises a 1,000 N weight a distance of 2.0m in 0.5s, what is the power output?

• 1,000 W

• 2,000 W

• 4,000 W

• 5,000 W

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

A 10-N force is exerted on a box, moving it 20m in the same direction. According to the diagram, what is the magnitude of work done on the box?

• 2J

• 10J

• 30J

• 200J

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4