Physics Work

Work is

• having a job

• movement

• energy transfer

• energy transfer to an object

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

if something is shifted a long way then there is ( ) work is being done

• less

• more

• same

• none

If the object does not move then what is happening

• nothing

• work

• power

• no work is being done on the object

the object has to be shifted or rearrange for work to occur

• true

• false

A bulldozer does 30,000 J of work over a distance of 20 meters. How much force did it apply?

• 1500 N

• 2000 N

• 1000 N

• 2500 N

Answer explanation

To calculate force, use the formula: Force = Work / Distance. Therefore, Force = 30,000 J / 20 m = 1500 N. The correct answer is 1500 N.

Tags

NGSS.MS-PS2-2

A 10 kg mass is lifted to 3 m. What is its weight? What is its potential energy? How much work is being done?

• Weight = 30 N

  PE = 30 J

  Work = 294 J

• Weight = 10 kg

  PE = 10 J

  Work = 30 J

• Weight = 98 N

  PE = 294 J

  Work = 294 J

• Weight = 98 N

  PE = 294 J

  Work = 30 J

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4

A 5000N block is lifted 10 m. Calculate the work done.

• 50000 J

• 5000 J

• 500 J

• 50 J

A 16 N force is applied to an object and 96 J of work is done. How far was the object moved?

• 6 m

• 16 m 

• 80 m 

• 1536 m 

How much work is produced when 350 N is used to move a car 5 m (W=Fd)?

• 70 J

• 1750 J

• 355 J

• 175 J

What is the definition of power?

• Power is the product of force and velocity.

• Power is the product of force and work done per unit time.

• Power is the product of force per unit time and velocity.

• Power is the rate at which work is done.

Tags

NGSS.MS-PS3-5