Work, Power and Energy

A kid throws a ball with a force of 70N over 1.1 meters. How much work did he do?

• 77 joules

• 70 joules

• 7.7 joules

• 11 joules

Tags

NGSS.MS-PS2-2

A 500N block is lifted 10 m. How much work was done?

• 5000 J

• 500 J

• 50 J

• 5 J

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A force exerted over a distance to move an object is ______________________.

• power

• work

• momentum

• Watt

The rate at which work is done.

• power

• force

• inertia

• energy

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

If 150 Joules of work is needed to move a box 10 meters, what force was used? 

• 1500 N

• 15 N

• 1.5 N

• 150 N

Tags

NGSS.MS-PS2-2

The rate (how fast) at which work is being done.

• Power

• Joules

• Work

• Newton

• No choice is correct

The formula for work is

• work/time (P = W/t)

• force × distance (W = Fd)

• distance/time (s = d/t)

• mass × acceleration (F = ma)

Tags

NGSS.MS-PS3-5

The formula for power is

• work/time (P = W/t)

• force × distance (W = Fd)

• distance/time (s = d/t)

• mass × acceleration (F = ma)

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Use one of these equations to answer this question (W = Fd) and (P = W/t): Toph pushes against the turret with 500 Newtons of Force. It stays in place. How much work has been done?

• 1200 Joules of work

• 500 Joules of work

• No work has been done

• 200,000 Joules of work

Use one of these equations to answer this question (W = Fd) and (P = W/t): When Aang fights Ozai, he wields 100,000 Joules in 25 seconds. What is his power?

• 4,000 J/s (Watts)

• 250,000 J/s (Watts)

• 125,000,000 Newtons

• 2,000,000 Joules

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5