2G1 Chapter 2 Forces SLS Quiz Part 3

Label the parts in a lever of the diagram below.

a

b

c

fulcrum

load

effort

Answer explanation

Load is the object that is to be lifted or moved.

An effort is the force applied to lift or move the load.

A fulcrum is the fixed point about which the lever turns.

Which of the following shows an inclined plane? 

• 
• 
• 
• 
• 

The images below show a person lifting a load with and without using a pulley. What do you notice about the direction of the effort in each image?

• The direction of the effort is the same for both cases.

• The direction of the effort he needed to apply was different for both cases.

The images below show a person lifting a load with and without using a pulley. The length of the arrows represents the amount of effort applied.

 

What do you notice about the amount of effort required to lift the load?

• The effort needed was the same for both cases.

• The effort needed was smaller when he used the pulley. 

Answer explanation

This option is incorrect. The length of the arrows represents the amount of effort applied. Less effort was needed when he used the pulley in (b).

Levers, inclined planes and ​ (a)   are three common types of simple machines.

The ​ (b)   of lever is the point about which the lever turns. An effort is applied to the lever to lift or move a load. An inclined plane is a flat surface with one end higher than the other. By moving the load along the inclined plane, ​ (c)   effort is required than if the load were to be lifted vertically.

• pulleys
• fulcrum
• less
• more
• load
• ramp

Which of these shows a lever?

• 
• 
• 
• 

Label the three different parts in the picture.

a

b

c

fulcrum

load

effort