Work

You know a force has been applied to an object when (a)   .

• it moves.
• it stays in place.
• it gets bigger.

Tags

NGSS.3-PS2-1

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

• power
• work
• momentum
• Watt

Work is done when an object has been subjected to ​ (a)   and it then ​ (b)   . No movement, ​ (c)  

• power is converted into Newtons

• an object stays in place

• force
• moves
• no work
• light

Tags

NGSS.MS-PS3-5

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

(a)  

• 85,200 J
• 45,620 J
• 90,480 J
• 62,329 J

Tags

NGSS.MS-PS2-2

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-PS3-5

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.MS-PS2-1

NGSS.MS-PS2-2

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-PS2-2

F = ma ; W = Fd

A worker with a mass of 50 Kg climbs a 2 meter ladder at a rate of 0.8 m/s². How much work was done?

First calculate force: ​ (a)   . You then ​ (b)   that by a distance of 2 meters. The work done was (c)  

• 80 N
• 80 J
• 52.8 J

• 40 J
• 40 N
• multiply
• divide

Tags

NGSS.HS-PS2-1

Fred hits a bludger with a force of 20N to George, who is 5 meters away. How much work was done? (a)  

• 25J
• 100J
• 4J
• 75J

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

F = ma W = Fd

A man reels in what he thinks is a fish. He estimates it has a mass of 3 Kg. He starts reeling at a rate of 5 m/s². He thinks his line is out 7 meters.

Force: ​ (a)  

Work: (b)  

• 105 N

• 525J

• 105 J
• 525 N

• 15 N

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2