Assessment No. 8 - Science 6

Which of the following is an example of a simple machine?

• a) A computer

• b) A bicycle

• c) A bookshelf

• d) A television

1. What type of simple machine is a ladder?

• a) Lever

• b) Screw

• c) Wedge

• d) Inclined plane

1. How does a wedge make work easier?

• 1. a) By increasing the force applied

• 1. b) By decreasing the force applied

• 1. c) By increasing the distance over which the force is applied

• 1. d) By decreasing the distance over which the force is applied

1. Which simple machine consists of a rigid bar that pivots around a fixed point?

• 1. a) Pulley

• 1. b) Screw

• 1. c) Wheel and axle

• 1. d) Lever

1. Which simple machine consists of a grooved wheel with a rope wrapped around it?

• 1. a) Pulley

• 1. b) Screw

• 1. c) Wheel and axle

• 1. d) Lever

1. What is the purpose of a screw?

• 1. a) To lift heavy objects

• 1. b) To separate two objects

• 1. c) To fasten objects together

• 1. d) To move objects horizontally

1. Which simple machine is used to change the direction or magnitude of a force?

• 1. a) Wedge

• 1. b) Screw

• 1. c) Pulley

• 1. d) Inclined plane

1. What type of simple machine is a wheelbarrow?

• 1. a) Wedge

• 1. b) 1st class Lever

• 1. c) 2nd class Lever

• 1. d) 3rd class Lever

1. What type of simple machine is a doorknob?

• 1. a) Screw

• 1. b) Wheel and axle

• 1. c) Lever

• 1. d) Pulley

1. What is mechanical advantage?

• 1. a) The speed at which a simple machine operates

• 1. b) The measure of how much the effort force is multiplied by a simple machine

• 1. c) The size of a simple machine

• 1. d) all of the above