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Year 9 Physics Review

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Physics

9th - 12th Grade

Used 6+ times

Year 9 Physics Review
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40 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What name is given to the energy stored when an object is lifted above the Earth’s surface?

chemical potential energy

elastic potential energy

gravitational potential energy

kinetic energy

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the equation used to calculate power?

power = energy transferresd/time

power = energy transferred × time

power = speed × time

power = 0.5 × energy transferred × (time)2

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is efficiency?

useful energy transferred by a device plus the total energy supplied to the device

useful energy transferred by a device minus the total energy supplied to the device

useful energy transferred by a device divided by the total energy supplied to the device

useful energy transferred by a device multiplied by the total energy supplied to the device

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A football has a mass of 0.4kg and travels at a speed of 30.5m/s. What is the kinetic energy stored in the football?

6.1J

12.2J

186.05J

372.1J

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A spring with a spring constant of 20N/m is extended by 0.2m. How much elastic potential energy is stored in the spring? Use the equation Ee = 1 2 k e2 .

0.4J

0.8J

1.6J

2.0J

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A motor is supplied with 2000J of energy. 1850J of energy is usefully transferred. What is the percentage efficiency of the motor?

0.925%

9.25%

92.5%

925%

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

50 000J of water is used to heat 2kg of water. Specific heat capacity of water = 4200J/kg °C. What is the temperature change of the water? Use the equation ΔE = m c Δθ.

2.98°C

5.95°C

11.90°C

23.81°C

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