Grade 8 Science Revision Quiz

The type of motion displayed by a pendulum is ______

• Rotatory

• Oscillatory

• Curvilinear

• Rectilinear

A car moving on a straight road displays ____

• Rotatory motion

• Rectilinear motion

• Oscillatory motion

• Periodic motion

If a body covers equal distance in equal intervals of time, the motion is said to be ___

• Uniform

• Non-uniform

• Oscillatory

• Rotatory

Acceleration of an object happens when things _____

• Slow down

• Go faster

• Change direction (turn)

• All of the above

What is the formula to calculate speed?

• Speed = time / distance

• Speed = distance / time

• Speed = distance x time

• Speed = time x distance

Which of the following statements about speed and velocity is correct?

• Velocity only describes an object’s rate of motion

• Speed describes how an object is changing its velocity

• Speed and velocity both describe how an object is speeding up

• Only velocity includes the direction an object is travelling.

The movement of our chest while breathing is an example of ___

• Periodic motion

• Linear motion

• Rectilinear motion

• Oscillatory motion

What is the net force?

• 30 N left

• 5 N right

• 5 N left

• 55 N right

What is the net force?

• 40 N left

• 0 N balanced

• 400 N right

• 40 N right

A boy on a bike rides down a hill 500 meters long in 50 seconds. What is his speed?

• 100 m/s

• 10 m/s

• 1,000 m/s

• 10 mph