Assessment Instructions Quiz

Which one of the following is the unit of work?

• Joule

• Kilogram

• Newton

• Watt

A stone is thrown into the air. At which position is the potential (gravitational) store of the stone greatest?

• A

• B

• C

• D

Which of the following is NOT an insulator?

• Glass

• Plastic

• Steel

• Wood

The diagram shows a person about to lift a hot pan from a stove. Which of the following handles would remain the coolest?

• Aluminium handle

• Copper handle

• Iron handle

• Wooden handle

When an archer pulls back the string on his bow, (a)   energy is stored in the bow.

• elastic potential
• chemical potential
• electrical
• gravitational potential
• kinetic
• light
• sound
• thermal

When a man lights a match, most of the chemical store is changed into

​ (a)   and ​ (b)   stores.

• light
• thermal
• chemical potential
• elastic potential
• electrical
• gravitational potential
• kinetic
• sound

In a hydroelectric pump, ​ (a)   store in the water from the dam flows down and converts into ​ (b)   store as it turns the turbine to generate ​ (c)   energy.

• chemical potential
• elastic potential
• electrical
• gravitational potential
• kinetic
• sound
• light

An electric train is initially at rest at a railway station. The motor causes a constant force of 360,000 N to act on the train and the train begins to move. The train travels a distance of 40 m along a straight, horizontal track.

What is the work done by the motor during this part of the journey?

If 5% of the work done by the motor is used to overcome friction along the tracks, how much work is done against friction?

• 720,000 J

• 1,440,000 J

• 360,000 J

• 72,000 J

If the total work done by the motor is 14,400,000 J and 720,000 J is used to overcome friction, what is the gain in kinetic energy by the train at the end of the 40 m journey?

• 13,680,000 J

• 14,400,000 J

• 720,000 J

• 40,000 J