Work or Not Work

Pushing a box across the room

• Work

• No Work

Lifting a laundry basket

• Work

• No Work

Tags

NGSS.MS-PS3-5

Is this an example of work?

• Yes

• No!

Tags

NGSS.MS-PS3-5

Which situation is work not done?

• lifting a 20 pound box off the floor

• holding a 20 pound box above the floor

• sliding a 20 pound box across the floor

• sliding a 20 pound box up an inclined plane

Is this an example of work?

• Yes

• No

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A force applied in order to move an object some distance is called (a)   .

• power

• work

• momentum

• Watt

How much work is being done with 200 N of force over 426 meters?

• 85,200 J

• 45,620 J

• 90,480 J

• 62,329 J

If 17 Newtons were necessary to move a crate 4 meters, how much work was done? (a)  

• 272 N

• 68 Joules

• 68 N

• 272 J 

Tags

NGSS.MS-PS2-2

F = ma ; W = Fd

If a 3 Kg object is moved 10 meters at a rate of 5 m/s/s, how much work was done?

First, calculate force (f=ma). Force = ​ (a)   . Then multiply that by a distance of ​ (b)   . The amount of work done was (c)   .

• 150 J

• 1.5 J

• 150 N

• 15N

• 10 meters

• 5 m/s/s

• 3 Kg

Tags

NGSS.HS-PS2-1

A family needs 10 Newtons of force to lift a box to the top of a 2 meter shelf. How much work do they do? (a)  

• 12 J

• 8 J

• 20 J

• 5 J

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2