Kinetic and Potential Energy Quiz

Study Notes

Kinetic Energy

Kinetic energy (KE) is energy in motion
Measured in Joules (J)
Formula: KE = 1/2 * m * v²
- m = mass (measured in kilograms, kg)
- v = velocity (measured in meters per second, m/s)

Potential Energy

Potential energy is stored energy
Three types:
- Elastic potential energy: stored in stretched or compressed objects (e.g., a spring, bow and arrow)
- Chemical potential energy: stored in chemical bonds (e.g., food, batteries)
- Gravitational potential energy (GPE): stored in objects due to their height above a reference point (e.g., a rock on a cliff)
Formula for GPE: GPE = m * g * h
- m = mass (kg)
- g = acceleration due to gravity (approximately 9.8 m/s²)
- h = height (m)

Examples and Practice Problems

Example 1: A jogger with a mass of 60 kg and a velocity of 3.0 m/s has a kinetic energy of 270 J.
Example 2: A baseball with a mass of 0.15 kg and a velocity of 40 m/s has a kinetic energy of 120 J.
Example 3: A 5 kg rock at a height of 10 m above the ground has a gravitational potential energy of 490 J.
Practice problem 1: A baseball with a mass of .15 kg moving at 40 m/s has K.E. of 120 joules.
Practice problem 2: A stone with 390 joules of energy moving at 12m/s has a mass of 5.42kg.
Practice problem 3: A 0.06kg ball moving at 50m/s has kinetic energy of 75 joules.
Practice problem 4: A 36,000 kg roller coaster at 20m has gravitational potential energy of 7,056,000 J.
Practice problem 5: A 1.5kg apple pie with 13.44 J of gravitational potential energy sits on a counter 0.91m high.
Practice problem 6: A 120 N suitcase on a 1.8m high counter has 216 J of energy.

Description

Test your understanding of kinetic and potential energy concepts, including their definitions, formulas, and examples. This quiz will cover both types of energy, including calculations involving mass, velocity, and height. Challenge yourself with practice problems to reinforce your knowledge!