HSPS Simple Machines Test

Where should the fulcrum be located in this lever to get the greatest mechanical advantage?

• at position II, because the effort arm and the load arm should have equal lengths

• at position IV, because the effort should be applied as close to the fulcrum as possible

• at position I, because the length of the effort arm should be greater than the length of the load arm

• at position III, because the length of the load arm should be greater than the length of the effort arm

A 62 kg box is lifted 12 meters off the ground. How much work was done?

• 5.17 J

• 72.91 J

• 744.0 J

• 7291.2 J

Calculate the amount of work done if you use a 100N force to push a 50kg box 5m across the kitchen floor.

• 250 J

• 500 J

• 5000 J

• 50,000 J

Which of the following is work NOT being done?

• Walking

• Shooting a bow and arrow

• Writing an essay

• A magnet picking up a paperclip

A 16 N force is applied to an object and 96 J of work is done. How far was the object moved?

• 6 meters

• 16 meters

• 80 meters

• 1536 meters

Lifting a bale of cotton is no easy task. Farmer Jones wanted to store the cotton in the loft of his barn but he could not budge the bale. He consulted the high school's science teacher for help. She suggested a simple machine. Farmer Jones' options included an inclined plane, a fixed pulley, a block and tackle, and a lever. If he had to lift the bale of cotton to a height of fifteen feet, which would be the MOST practical solution?

• lever

• screw

• inclined plane

• block and tackle (pulley)

We can classify both the shovel and the garden trowel as compound machines. This is because each garden tool contains two simple machines.

• a lever and a wedge

• a blade and a handle

• a lever and a pulley

• an inclined plane and a wedge

What is the mechanical advantage of the block and tackle used to lift the bale of cotton?

• 1

• 2

• 3

• 4

If you closely examine a wood screw, you will see that the threads on it form a long ______ wrapped around a cylinder.

• wedge

• pulley

• inclined plane
• wheel and axle

Movers want to raise a heavy crate onto a platform. The platform is 3 meters (m) above the ground. The movers do not have enough force to push the crate up the ramp shown in the diagram. Which solution will best allow the movers to achieve their goal?

• Change the width of the ramp from 4 meters to 3 meters.

• Change the length of the ramp from 4 meters to 5 meters.

• Change the height of the ramp from 3 meters to 4 meters.

• Change the length of the ramp from 3 meters to 2 meters.