The Law of Conservation of Energy

What is energy?

• The ability to do work

• The ability to create matter

• The ability to produce light

• The ability to generate heat

What makes up the universe according to the text?

• Energy and light

• Matter and energy

• Matter and light

• Energy and heat

What role does energy play in relation to matter?

• Energy is the creator of matter

• Energy is the mover of matter

• Energy is the destroyer of matter

• Energy is the transformer of matter

In the formula for gravitational potential energy, what is the value of 'g'?

• 9.8 m/s^2

• 9.8 m/s

• 9.8 m

• 9.8 kg

What is elastic potential energy?

• Energy due to the motion of an object

• Energy due to the position of an object

• Potential energy due to compression or expansion of an elastic object

• Energy due to chemical reactions

Calculate the kinetic energy of a 0.25 kg cricket ball moving at 50 m/s.

• 312 J

• 250 J

• 500 J

• 150 J

If you carry a 20 kg suitcase upstairs a distance of 4 meters, what is the work done?

• 800 J

• 400 J

• 200 J

• 100 J

How is a watt defined in terms of energy and time?

• The expenditure of 1 joule of energy in 1 minute

• The expenditure of 1 joule of energy in 1 second

• The expenditure of 1 joule of energy in 1 hour

• The expenditure of 1 joule of energy in 1 millisecond

If a light bulb consumes 75 joules per second, what is its power rating in watts?

• 50 watts

• 100 watts

• 75 watts

• 25 watts

Which unit is used to measure Work?

• Newtons (N)

• Joules (J)

• Watts (W)

• Meters (M)