Energy Work and Power IGCSE

A ball is dropped onto a floor. Its speed just before hitting the floor is 3.0 m / s. Which change would result in a speed of 6.0 m / s just before hitting the floor? Ignore any effects due to air resistance.

• A Drop the ball from double the height above the floor.

• B Drop the ball from four times the height above the floor.

• C Use a ball with double the mass.

• D Use a ball with four times the mass.

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-2

Which list contains only energy resources that derive their energy from the Sun?

• A geothermal, nuclear, tidal

• B hydroelectric, water waves, wind

• C geothermal, hydroelectric, solar

• D nuclear, solar, water waves

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

A lamp has a power input of 5.0W. It wastes 1.0W of power heating the surroundings. What is the efficiency of the lamp?

• A 20%

• B 50%

• C 80%

• D 120%

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

The volume of a gas is measured at different pressures. The pressure p and the volume V of the gas are found to be related by the equation: pV = constant. Which quantities are kept constant and which quantities change?

• A

• B

• C

• D

• A

• B

• C

• D

Tags

NGSS.HS-PS3-4

• A

• B

• C

• D

A copper container of mass 0.20kg contains 0.10 kg of water. The specific heat capacity of copper is 385 J /(kg °C) and the specific heat capacity of water is 4200 J /(kg °C). How much energy, in joules, is needed to raise the temperature of the copper container and the water by 10 °C?

• A

• B

• C

• D

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

NGSS.HS-PS3-4

• A

• B

• C

• D

Tags

NGSS.HS-PS3-4

NGSS.HS-PS4-3

An object has a mass of 500 kg. It moves with a speed of 30 m / s. What is its kinetic energy?

• A 7.5 kJ

• B 15 kJ

• C 225 kJ

• D 450 kJ

Tags

NGSS.HS-PS3-1