PHYSICS W4

What is energy?

• A concept to solve motion problems

• A form of matter

• A physical property indicating the ability to do work

• A type of force

What is the unit of work in the SI system?

• Joule

• Newton

• Watt

• Erg

What is the formula for kinetic energy?

• KE = Fd

• KE = mv^2

• KE = 1/2mv^2

• KE = mgh

What is the type of energy stored in a moving object?

• Kinetic energy

• Potential energy

• Chemical energy

• Nuclear energy

What is the SI unit of power?

• Joule

• Newton

• Erg

• Watt

What is the conservation of mechanical energy?

• Potential energy x Kinetic energy = constant

• Potential energy - Kinetic energy = constant

• Potential energy + Kinetic energy = constant

• Potential energy / Kinetic energy = constant

What is the formula for impulse?

• Impulse = Work / Time

• Impulse = Change in Momentum

• Impulse = Mass x Velocity

• Impulse = Force x Time

What is the coefficient of elasticity for an elastic collision?

• 0

• 2

• 1

• 0.5

What is the SI unit of power?

• Watt

• Newton

• Joule

• Erg

What is the formula for kinetic energy?

• KE = 1/2mv^2

• KE = Fd

• KE = mgh

• KE = mv^2