Grade 10

A student determines the circumference of a football.

Which instrument gives a reading that is the circumference of the football?

• calipers

• micrometer

• rule

• tape

A student lists three changes that affect the stopping distance of a car.

1 increasing the braking force

2 increasing the friction between the tyres and the road

3 increasing the speed of the car

Which change or changes increase the stopping distance?

• 1 and 2

• 1 and 3

• 1 only

• 3 only

The gravitational field strength in space is smaller than on the Earth’s surface.

A rocket is used to launch a satellite from the Earth’s surface into space.

How are the mass and the weight of the satellite affected as the satellite moves away from the surface of the Earth and into space?

• Both the mass and the weight are unaffected.

• The mass decreases and the weight decreases.

• The mass increases and the weight is unaffected.

• The mass is unaffected and the weight decreases.

A car of mass 800 kg has a forward acceleration of 2.5 m / s2.

A frictional force of 1200 N opposes the motion of the car.

What is the driving force due to the engine of the car?

• 800 N

• 1200 N

• 2000 N

• 3200 N

A list of various quantities is shown.

acceleration

displacement

force

length

mass

velocity

How many of these quantities are vectors?

• 2

• 3

• 4

• 5

Which expression is used to calculate density?

• mass * volume

• volume/

  mass

• volume + mass

• mass/

  volume

What is measured using a micrometer?

• area

• current

• length

• mass

A car of weight 11 000 N moves with constant velocity along a horizontal road. A driving force of 5000 N acts on the car.

What is the force opposing the motion of the car?

• 5000 N

• 6000 N

• 11 000 N

• 16 000 N

Which physical quantity does not change when a piece of copper is heated?

• density

• mass

• temperature

• volume

A single metal bolt has a mass of 34 g.

Three of the bolts are immersed in a measuring cylinder

that contains 30 cm3 of water.

The reading on the measuring cylinder rises to 42 cm3.

What is the density of the metal?

• 0.81 g / cm3

• 2.8 g / cm3

• 7.5 g / cm3

• 8.5 g / cm3