Test

Which of the following is an example of linear motion?

• A ball rolling down a hill

• A car turning a corner

• A bicycle moving in a circular track

• A pendulum swinging back and forth

Which of the following is considered a scalar quantity?

• velocity

• displacement

• acceleration

• speed

The net force acting on an object is zero. What can you conclude about the object?

• it is at rest

• it is moving with a constant velocity

• it is accelerating

• it is moving with a constant velocity

Which of the following is non-contact force?

• friction

• tension

• gravitational force

• normal force

What is the unit work?

• Joule

• Newton-meter

• Watt

• All of the above

Which of the following is not a form of potential energy?

• Gravitational potential energy

• Elastic potential energy

• kinetic energy

• chemical potential energy

A car travels a distance of 100km in 2 hours. What is its average speed?

• 20km/h

• 50km/h

• 100km/h

• 200km/h

What is the definition of power?

• force times velocity

• work divided by time

• mass times acceleration

• energy divided distance

An object at rest on the ground has gravitational potential energy of:

• zero

• maximum

• minimum

• varies depending on mass of the object

A machine does 500joules of work in 10seconds. What is its power?

• 5watts

• 10wattts

• 50watts

• 100watts