AQA Physics Paper 1- Energy Transfers

In order to do work, energy is

• A.  transferred
• B.  used up
• C.  lost
• D.  lost or transferred

When a melon is dropped onto a pavement which of the following best describes what happens to energy?

• A.   The gravitational potential store reduces and the heat store of the surroundings increases.
• B.   The melons gains kinetic energy, which is lost when it hits the floor.
• C.   The melon’s energy store steadily reduces as it falls.
• D.   The gravitational potential store increases and the heat store of the surroundings increases.

If 90J of energy goes into a torch and 50J is transferred by lighting, how much is transferred by heating?

• A.   0 J
• B.   40J
• C.   50J
• D.   90J

Identify the energy transfer

• electrical to chemical to light

• kinetic to potential

• chemical to electrical to light

• light to sound

Identify the energy transfer

• chemical to solar

• electrical to thermal

• chemical to light

• thermal to kinetiv

What is the kinetic energy of a man of mass 80 kg running at 4 m/s ?

• 320 J

• 160 J

• 640 J

• 25,600 J

How fast is a car travelling if it has 18,000 J of kinetic energy and a mass of 1000 kg.

• 6 m/s

• 18,000,000 m/s

• 18 m/s

• 36 m/s

A mass of 20 kg is raised through a distance of 30 m. How much gravitational potential energy does it gain? (Note that g=9.8 m/s² on the Earth.)

• 5,880 J

• 600 J

• 61.2 J

• 14.7 J

3000 J of energy are used to raise an object through a height of 15 m. What was the mass of the object. (Assume that g = 9.8 m/s².)

• 20.4 kg

• 442,000 kg

• 200 kg

• 4591.8 kg

How much work is done when a 2400 W kettle takes 120 seconds to boil?

• 20 J

• 288,000 J

• 0.05 J

• 200 J