M2 Chapter 6 Multiple Choice practice

Work is measured using the unit known as...

• Newtons

• Joules

• Watts

• Calories

Which of these increases the amount of work done?

1. Increase the force applied

2. Increase the displacement of the object

3. Increase the time taken to do the work

• 1 and 2

• 1 and 3

• 2 and 3

• 1, 2 and 3

In which situation is work not done?

• A worker lifted a bag up to the second floor

• A worker carried a bag and walked for 5 meters

• A tow car pulled a car along a road

• A man rowed his boat on a river

Look at question 5 on p. 72 in your Workbook. Which path has the least work done?

• Path X

• Path Y

• Path Z

• All involve the same amount of work done

Which of the following shows the formula to calculate power?

• Work done/ Time taken

• Force applied/ Time taken

• Time taken/ Work done

• Work done x Time taken

A wheelbarrow is an example of a _______________ class lever.

• First

• Third

• Fourth

• Second

Which simple machine is used on a flagpole to help raise the flag?

• Inclined plane

• Pulley

• Lever

• Wheel and axle

Which of these was an example of an animal using a simple machine?

• Crows building sticks to find insects

• The octopus taking the fish out of the bottle

• Beavers building dams

• None of these are examples of simple machines

What type of simple machine did the orangutan learn how to use?

• Pulley

• Wheel and axle

• Inclined plane

• Wedge

How does the beaver cut down trees?

• Using a saw

• Using its teeth

• It uses them to make a dam

• A wedge