Work

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.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

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.MS-PS2-1

NGSS.MS-PS2-2

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.HS-PS2-1

A boulder sits at the top of a hill.

(1) Has work been done? (a)  

(2) How do you know? (b)  

• Yes.

• No.

• There was no movement

• Force was applied and an object moved 

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A student pushes a boulder up a hill. (1) Has work been done? (a)   (2) How do you know? (b)  

• Yes.

• No.

• There was no movement

• Force was applied, and an object moved

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-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

A student pushes another student down the hallway.

(1) Has work been done? (a)  

(2) How do you know? ​​ (b)  

• Yes.

• No.

• There was no movement

• Force was applied and an object moved

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2