HW4.1 Work, Power, and Energy

Front

The SI unit for power is the _____

Back

Watt

Front

If you carry a 5 kg box across the room at a constant velocity, you do _____ work.

Back

no

Front

A 100 N force is applied to move an object a horizontal distance of 5 meters at constant speed in 10 seconds. How much power is done?

Back

50W

Front

If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?

Back

17 m

Front

What is the kinetic energy of a 10 kg ball moving at 3 m/s?

Back

45 J

Front

Define work in physics.

Back

Work is done when a force causes an object to move in the direction of the force. It is calculated as Work = Force x Distance.

Front

What is the formula for calculating power?

Back

Power = Work / Time.

Front

What is the relationship between work and energy?

Back

Work is the transfer of energy; when work is done on an object, energy is transferred to or from that object.

Front

What is the formula for kinetic energy?

Back

Kinetic Energy = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration, commonly gravitational potential energy.