Junior 1 Physics

Look at the diagram. Which point does the ball have the maximum gravitational potential energy?

• A

• C

• F

• G

The force of gravity acting on an object is also called its_____________.

• velocity

• speed

• weight

• mass

A student wants to find out which end is the magnet’s north pole. What could he do to find out?

• Put the magnet under a piece of paper, and sprinkle iron filings（撒铁粉） on top.

• Put it near to a piece of magnetic material, like a steel paperclip.

• Place a compass near it.

The diagram shows the dates of four of the Moon phases observed during June, 2008. On which date did the next New Moon occur?

• July 2

• July 9

• July 10

• July 27

A moving car has kinetic energy. If the car moves faster, it will have _______ kinetic energy.

• the same

• less

• no

• more

The distance between the Earth and the Sun is around 150,000,000 km. Express this value in scientific notation.

• 15 x 10 ⁷ km

• 1.5 x 10⁷ km

• 15 x 10⁸ km

• 1.5 x 10⁸ km

Which of the following methods could be used to demagnetise a permanent magnet?

• Cool it to a very low temperature.

• Put it in a coil of wire and pass current through the wire.

• Stroke it in a single direction with a permanent magnet.

• Heat it to a high temperature.

In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the resultant force?

• 50N to the left.

• 350N to the left.

• 350N to the right.

• 50N to the right.

If the Earth is in its orbit as shown in the picture. Which season would it be in the Northern Hemisphere?

• Summer

• Winter

• Autumn

• Spring

What two measurements are necessary for calculating speed?

• Mass and time

• Mass and distance

• Temperature and mass

• Distance and time