Energy, Work and Power

One of the tallest radio towers is in Fargo, North Dakota. The tower is 629 m tall. If a bird lands on top of the tower, so that the gravitational potential energy associated with the bird is 2033 J, what is its mass?

Let g = 9.8N/kg

• 1,278,757 kg

• 12,531,819 kg

• 3.25 kg

• 0.330 kg

• 0.309 kg

What is the kinetic energy of a 4kg shotput thrown with a velocity of 13m/s

• 676 J

• 52 J

• 17J

• 338 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

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

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NGSS.MS-PS3-1

NGSS.MS-PS3-4

Read the picture, then fill in the blank: The ability to work or cause change is _

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NGSS.MS-PS3-5

Read the picture, then fill in the blank: The rate at which energy is transferred is called _.

Read the picture then fill in the blank: The person with the shovel has less power than a snowblower because it transfers the same amount of energy in _ time.

The ability to do work or cause change.

• power

• energy

• work

Tags

NGSS.MS-PS3-5

Energy and work are measured in...

• newtons

• joules

• hertz

• kilograms

When you do work on an object, some of your energy is ____ to that object.

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NGSS.MS-PS3-5

_______________ is done when a force acts on an object and the object moves in the direction of the force.

• Work

• Kinetic energy

• Watt

• Joule