Lesson 11: Work Done/ Energy Transfer

Question 1

When is “work done” to an object?

Answer 1

• When a force causing an object to move through a distance, work is done on the object.

Question 2

What is the equation for work done?

Answer 2

Work Done (J) = force x distance (moved along the line of action of the force.)

Question 3

When a force causes an object to move, what is the force doing to the object?

Answer 3

• The force does work on the object in order for the object to be displaced ie. for the object to move.

Question 4

Give a unit that is equivalent to 1J….

Answer 4

1J = 1Nm

Question 5

What happens when work is done against frictional forces acting on an object?

Answer 5

• Causes a rise in the temperature of the object.