Work and Energy

Force is measured in ________.

• Joules
• Kilograms
• Pounds
• Newtons

If 68 W of power is produced in 18 seconds, how much work is done?

• 1,224 J

• 0.264 J

• 3.77 J

• 12.24 J

The Royal Gorge Bridge is situated 321m above the Arkansas River in Colorado.  If the gravitational potential energy associated with a tourist on the bridge is 173000J with respect to the river, what is the tourist’s mass?

• 5290.5 kg
• 0.018 kg
• 5.42 kg
• 54.99 kg

What is one Law of Conservation of Energy?

• Energy can be created or destroyed.

• Energy can be transferred from one object to another.

• Energy does nothing.

Tags

NGSS.MS-PS3-5

__________ force opposes the motion of an object and slows the object down.

• Applied
• Normal
• Friction
• Gravitational

Which of the following types of energy is present in the wound-up rubber band in a toy airplane?

• mechanical energy

• kinetic energy

• potential energy

• elastic potential energy

Which of the following types of energy is in the food you eat?

• chemical energy

• thermal energy

• light energy

• nuclear energy

When the wires in a hair dryer heat up, which of the following types of energy change takes place?

• electrical energy to potential energy

• electrical energy to light energy

• electrical energy to thermal energy

• electrical energy to sound energy

On a bike, your legs transfer _________ energy to the pedals.

• kinetic

• machine

• sound

• potential

Work is made easier when you use a(n) ________.

• kinetic

• machine

• sound

• potential