Work and energy

A box is pushed by 20 N force to the right and displace for 0.1 m. What is the work done?

• 0.005 J

• 0.1 J

• 1 J

• 2 J

What is the formula of work?

• W = F / d

• W = F + d

• W = F x d

• W = F - d

A car has speed 5 m/s and the mass of the car 1000 kg. What is the kinetic energy of the car?

• 12500 J

• 25000 J

• 5000 J

• 2500 J

Which of the following variable is not affect the potential energy?

• height from ground

• gravitational acceleration

• mass

• temperature

• 4 cm

• 40 cm

• 400 cm

• 4 km

In which scenario is work = 0 J ?

• Pushing a stationary wall

• Pulling a trolley car

• Pushing a book across the table

• Dropping a set of keys from a height, h.

If the net work done on an object is positive, what can you conclude about the object's motion?

• The object is speeding up.

• The object is moving with a constant velocity.

• The object is slowing down.

• The object is at rest; its position is constant.