Work & Power

Which of these is a measurement of power?

• 100 joules
• 100 watts
• 100 meters per second
• 100 hertz

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.

Tags

NGSS.MS-PS3-5

When is positive work done?

• When an object moves in the same direction as its force.
• When an object moves in the opposite direction as its force.
• When a force causes the object to move more quickly.
• When an object stops moving.

Tags

NGSS.HS-PS2-1

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-PS3-5

How do you know when a force has been applied to an object?

• It moves.
• It flies.
• It accelerates.
• It gets bigger.

Tags

NGSS.3-PS2-1

NGSS.3-PS2-2

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.

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

• 5000 J
• 500 J
• 50 J
• 5 J

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

• power
• work
• momentum
• Watt

Tags

NGSS.MS-PS3-5