Work and Power Calculations

How long would it take a machine to use 50 W of power if 1000 J of work is done? (Record just the number as your answer)

What force is applied to an object if 150 J is applied over a distance of 75 m? (Just write the number you calculate)

Fred kicks a ball with a force of 20N to George, who is 5M away. How much work was done to the ball?

• 25J

• 100J

• 4J

• 75J

Tags

NGSS.MS-PS3-5

45J of work were done on the object that moved 5M. How much force was applied to the object?

• 8N

• 225N

• 9N

• 0N

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

• 12 J

• 8 J

• 20 J

• 5 J

A worker climbs a ladder and does 8 J of work on a 2 N object. What is the distance they lift the object?

• 18 m

• 4 m

• 10 m

• 6 m

Two factors that determine work are

• size of the force, and distance

• size of the force, and type of force

• mass, and distance

if you push a cart with a force of 60 N for 2 m... how much work have you done

• 120 J

• 30 J

• 120 N

• 30 N

How much power is required to raise a 200-kg crate a vertical distance of 2 m in a time of 4 s?

• 400 W

• 1000 W

• 1600 W

• 4000 W

Tags

NGSS.MS-PS3-5

What is the mass of a moving object that has 100 Joules of KE and moves at a velocity of 2 m/s?

• 50 kg

• 200 kg

• 25 kg

• 100 kg

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4