Understanding Kinetic and Potential Energy

What is the formula for kinetic energy?

• KE = 1/2 k x^2

• KE = 1/2 m v^2

• KE = mgh

• KE = mv

If the mass of an object is doubled, how does the kinetic energy change?

• It remains the same

• It halves

• It doubles

• It quadruples

What happens to the kinetic energy if the velocity of an object is doubled?

• It halves

• It quadruples

• It remains the same

• It doubles

What is the formula for gravitational potential energy?

• PE = mv

• PE = 1/2 k x^2

• PE = 1/2 m v^2

• PE = mgh

If an object falls from a height, what happens to its potential energy?

• It disappears

• It increases

• It is converted to kinetic energy

• It remains constant

What is the speed of an object just before it hits the ground if its kinetic energy is 4900 joules and its mass is 10 kg?

• 15.5 m/s

• 49.0 m/s

• 31.3 m/s

• 62.6 m/s

What type of potential energy is stored in a compressed or stretched spring?

• Chemical energy

• Elastic potential energy

• Kinetic energy

• Gravitational potential energy

What does the spring constant (k) in the formula for elastic potential energy represent?

• The mass of the spring

• The potential energy of the spring

• The stiffness or looseness of the spring

• The length of the spring

If the spring constant is high, what does it say about the spring?

• It is easy to stretch or compress

• It is difficult to stretch or compress

• It has high potential energy

• It has low kinetic energy

What is the unit of measurement for the spring constant in the formula for elastic potential energy?

• Newtons per meter

• Joules

• Kilograms

• Meters per second squared