Physics Challenge 3

Which quantity is a vector quantity?

• Area

• Length

• Distance

• Displacement

Diagram below shows a velocity-time graph for a motion of an object.

What is the total distance, in m, travelled by the object in 8 s?

• 18

• 24

• 32

• 64

Diagram below shows the position of a plate before and after the table cloth is snatched away.

The plate remains stationary due to

• inertia

• impulse

• momentum

• linear motion

Diagram below shows a coconut falling from a tree.

Which graph shows the relationship between the gravitational force, F, acting on the coconut and the mass, m, of the coconut?

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Which statement is correct about the earth gravitational force?

• Not all objects on the earth are influenced by the earth gravitational force

• The earth gravitational force is stronger when an object is further away from the centre of the earth

• The acceleration of all falling objects is influenced by the earth gravitational force

• The earth gravitational force that acts towards the centre of the earth is uniform

Which diagram shows forces in equilibrium?

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Which graph represents Hooke’s Law?

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Diagram below shows a container filled with water.

Which is the correct comparison of the pressures at P and Q?

• Pressure at P > pressure at Q

• Pressure at P = pressure at Q

• Pressure at P < pressure at Q

Diagram below shows a mercury barometer.

Which change increases the height, h, of the mercury?

• Add more mercury in the container

• Place the barometer at the seaside

• Place the barometer below sea-level

• Place the barometer to the top of a mountain

What happens to the gas molecules in a balloon at room temperature when the balloon is placed inside a freezer?

• The kinetic energy of the gas molecules decreases

• The potential energy of the gas molecules increases

• The distance between the gas molecules increases

• The size of the gas molecules decreases