ASTS Practice: Simple Machines

Which one is not an advantage of using a simple machine?

• The machines can multiply force

• The machines can change the direction of force

• The machines can multiply distance

• The machines are easy to be used

When a lever has its force (input force) in the middle, fulcrum and load (output force) on the edges, that mean the lever is..

• in class 1

• in class 2

• in class 3

• immovable

Which one is not an example of lever class 1?

• 
• 
• 
• 

Which one cannot be correct if a simple machine has MA=2?

• The resistance arm is two times the effort arm.

• The input force is half the output force (load).

• There are two ropes pulling up a load on a pulley.

• The length of the inclined plane is two times the height.

Put the correct label on A and B.

• A= force, B= weight

• A= weight, B= force

• A: effort arm, B: resistance arm

• A: resistance arm, B: effort arm

Take a look at this lever. If the effort arm is 3 m and the MA is 3, what is the total length of the lever?

• 1 m

• 2 m

• 3 m

• 4 m

An inclined plane helps in transporting a 22 N load only with a 2 N force. If the length of the inclined plane is 11 m, its height is...

• 1 m

• 10 m

• 12 m

• 0.99 m

From the previous question: An inclined plane helps in transporting a 22 N load only with a 2 N force. If the length of the inclined plane is 11 m, its height is...

Choose the correct drawing of the inclined plane.

• A

• B

• C

• D

An inclined plane with MA= 6 is used to push a number of bricks. The force used to push them is 15 N. If each brick is 1 kg, how many bricks can be moved at once?

• 4 bricks

• 40 bricks

• 9 bricks

• 90 bricks

This picture of a compound pulley is for number 10-12.

What is the mechanical advantage of the pulley on the picture?

• 2

• 4

• 5

• 6