Work - Quiz

A force of 50 N acts on the block at the angle shown in the diagram. The block moves a horizontal distance of 3.0 m. How much work is done by the applied force?

----------- J. (your answer should be in 2 sig fig)

It takes 20 N of force to move a box a distance of 10 m. How much work is done on the box in Joules?

• 200 J
• 20.0J
• 100 J
• 10 J

What is the reasonable explanation for work done in this situation?

• The work being done is equal to zero due to equal forces being applied by each person.
• The work being done is not equal to zero due to the sum of the force each person is applying.
• The work being done is not equal to zero due to the unbalanced force each person is applying.
• To the force each person is applying times the mass of the table.he work being done is equal t

If 63 J of work is done in lifting a 6.8 kg bag of groceries, how far is it lifted? 

• 9.3 cm
• 930 cm
• 0.94 cm
• 91 cm

A child moving at constant velocity carries a 2 N ice-cream cone 1 m across a level surface. What is the net work done on the ice-cream cone? 

• 0J
• 2J
• 0.5J
• 20J

A worker pushes a box with a horizontal force of 50.0 N over a level distance of 5.0 m. If a frictional force of 43 N acts on the box in a direction opposite to that of the worker, what net work is done on the box ?

• 215 J
• 35 J
• 250 J
• 18.6 J

If the sign of work is negative, 

• the displacement is perpendicular to the force. 
• the displacement is in the direction opposite the force
• the displacement is in the same direction as the force.
• no work is done

Calculate the work needed to raise a 3 kg cat up to a height of
4 m.

• 12 J
• 0 J
• 120 J
• 1.22 J

Which of the following statements are true about work?

• Work is a form of energy.

• A Watt is the standard metric unit of work.

• Work is a time-based quantity; it is dependent upon how fast a force displaces an object.

• None of these.

It takes 25.0 N of force to move a box a distance of 20.0 m. How much work is done on the box in Joules?

• 500. J
• 50.0J
• 25.0 J
• 100. J