Understanding Work and Energy Concepts

What is the definition of work in physics?

• amount of possible energy transferred when an object is moved by an external force over a distance

• amount of actual energy transferred when an object is moved by an external force over a distance

• the amount of energy used to hold an object stationary

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NGSS.MS-PS3-5

What is the formula for calculating work?

• W = F × d, where W is work, F is force, and d is distance.

• W = m × a, where m is mass and a is acceleration.

• W = P × t, where P is power and t is time.

• W = V × I, where V is voltage and I is current.

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NGSS.MS-PS3-5

Units of work are expressed in which unit?

• Joules (J)

• Watts (W)

• Newtons (N)

• Volts (V)

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NGSS.HS-PS2-1

Holding an object stationary constitutes work.

• True

• False

Which of the following is NOT an example of work?

• Pushing a grocery cart

• Lifting a backpack

• Throwing a discus

• Holding an object stationary

Energy is defined as the capacity to do work and is measured in ________.

• Joules

• Watts

• Volts

• Amperes

Which of the following is NOT a type of energy?

• Mechanical

• Chemical

• Electrical

• Frictional

Potential energy is energy stored due to an object's ________.

• position

• color

• temperature

• speed

Tags

NGSS.MS-PS3-2

What is the formula for gravitational potential energy (PE)?

• PE = mgh, where m is mass, g is gravitational acceleration, and h is height.

• PE = mg/v, where m is mass, g is gravitational acceleration, and v is velocity.

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NGSS.MS-PS3-2

A 5 kg ball held 600 meters above the ground has a potential energy of approximately how many Joules?

• 12000 Joules

• 30000 Joules

• 3000 Joules

• 300 Joules

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NGSS.MS-PS3-2