Calculating Work and Energy Transfer in Different Situations

The video tutorial explains how energy is transferred when work is done, using the formula W = Fs, where work done in joules equals force in newtons times distance in meters. It provides three examples: moving a box across a floor, lifting a barbell, and dropping a ball. Each example illustrates different energy transfers, such as chemical to thermal energy, chemical to gravitational potential energy, and gravitational potential to kinetic energy.

What is the formula for calculating work done when a force moves an object?

• W = F + s

• W = F / s

• W = F * s

• W = F - s

In the first example, what type of energy is primarily converted into thermal energy due to friction?

• Gravitational energy

• Chemical energy

• Nuclear energy

• Electrical energy

How much work is done when a 20 newton force moves a box 5 meters?

• 50 joules

• 100 joules

• 150 joules

• 200 joules

What type of energy is converted into gravitational potential energy when a weightlifter lifts a barbell?

• Thermal energy

• Kinetic energy

• Chemical energy

• Sound energy

When gravity does work on a ball, what type of energy is transferred into kinetic energy?

• Electrical energy

• Gravitational potential energy

• Chemical energy

• Thermal energy