Work and Power Problems

How much work is done when a 45 N force moves an object 20 m?

• 800 J

• 900 J

• 1000 J

• 750 J

What units are used to measure Work?

• watts (W)

• joules (J)

• newtons (N)

• pascals (Pa)

Tags

NGSS.HS-PS2-1

What is the formula for calculating Work?

• Work = Force x Distance

• Work = Mass x Acceleration

• Work = Energy x Time

• Work = Power x Speed

What is Power in physics?

• The amount of force applied over a distance.

• The rate at which work is done or energy is transferred.

• The total energy consumed in a system.

• The speed at which an object moves.

What is the formula for calculating Power?

• Power = Work / Time

• Power = Force x Distance

• Power = Mass x Acceleration

• Power = Energy x Time

Tags

NGSS.MS-PS3-5

If a weightlifter lifts two 300 N weights 1.5 m, how much work is done?

• 600 J

• 900 J

• 750 J

• 1200 J

Tags

NGSS.MS-PS2-4

What is Work in physics?

• Work is defined as the product of force and the distance over which that force is applied.

• Work is the energy transferred by a force acting through a distance.

• Work is the rate at which energy is transferred.

• Work is the total energy of a system.

Tags

NGSS.HS-PS2-1

What is the relationship between Work, Force, and Distance?

• Work is inversely proportional to the force applied and the distance moved.

• Work is directly proportional to both the force applied and the distance moved in the direction of the force.

• Work is independent of the force applied and the distance moved.

• Work is only dependent on the distance moved, regardless of the force applied.

If 90 joules of work is done in 30 seconds, what is the power generated?

• 2 watts

• 3 watts

• 4 watts

• 5 watts

What units are used to measure Power?

• Joules (J)

• Watts (W)

• Volts (V)

• Amperes (A)