Grade 09 Science Practice Questions

Differentiate between distance and displacement.

Determine the total displacement of a dog that runs 15 m north, 6 m south, then 8 m north.

Distance is different from displacement because:

• Distance has a direction.

• Distance is a vector quantity.

• Distance does not have direction.

• Displacement is always greater than distance

A student walked a distance of 1.60 km in 30 min. Find her average speed in m/s.

A cyclist covers a distance of 20 km in 4 hrs. What is the average speed of the cyclist?

• 0.2 km/h

• 1.4 km/h

• 5.0 km/h

• 80 km/h

What is the speed of a walker who covers a distance of 1000 m in 1500 seconds?

• 0.67 m/s

• 1.6 m/s

• 20 m/s

• 40 m/s

The direction and speed of an object is described by its .

• average displacement

• average speed

• displacement

• velocity

If a runner maintains a constant speed of 12 km/h, how long will it take to complete a marathon race of 42 km?

• 2.2 h

• 3.1 h

• 3.5 h

• 5.3 h

What is the equation for momentum?

• p = m/v

• f = ma

• f = m/a

• p = mv

If a soccer ball has a mass of 0.4 kg and a velocity of 20 m/s east, what is its momentum?

• 8 kgm/s west

• 8 kgm/s east

• 50 kgm/s west

• 50 kgm/s east