Physics Final Exam

Front

What is the unit of force?

Back

Newton

Front

How is potential energy (PE) calculated for an object at height?

Back

PE = mass (kg) × gravity (9.81 m/s²) × height (m)

Front

If a 6 kg mass has 80 J of potential energy, how far off the ground is it?

Back

1.36 m

Front

What is the formula for calculating work done?

Back

Work = Power × Time

Front

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

Back

1,224 J

Front

What is the relationship between force and work done?

Back

The bigger the force, the more work is done.

Front

What type of energy is associated with chemical reactions?

Back

Chemical energy

Front

What is the formula for kinetic energy (KE)?

Back

KE = 0.5 × mass (kg) × velocity² (m/s²)

Front

What is the unit of power?

Back

Watt (W)

Front

What is the principle of conservation of energy?

Back

Energy cannot be created or destroyed, only transformed.