Work

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

• power

• work

• momentum

• Watt

Which of the following is true about work?

• It measures how quickly an object accelerates

• It measures how much effort is applied over a distance.

• It measures the change of an object's rate of speed.

• It measures how much time it takes to move an object.

What units do we use to measure work?

• watts

• newtons

• joules

• meters

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

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

NGSS.MS-PS3-5

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

• 5000 J

• 500 J

• 50 J

• 5 J

Tags

NGSS.MS-PS3-5

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

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

What is the equation for calculating power?

• distance / time

• work x time

• work / time

• force x distance

In which of these cases is work being done? 

• A student sleeps all night.

• A student pushes a locked door that does not move.

• A student carries his chair into another room.

• A student sits on the carpet.

The formula for power is

• work/time (P = W/t)

• force × distance (W = Fd)

• distance/time (s = d/t)

• mass × acceleration (F = ma)