Work and Simple Machines Review

Which pulley system will provide the greatest mechanical advantage? (1, 2, 3, or 4)

• 1

• 2

• 3

• 4

Tags

NGSS.MS-ETS1-2

Which of the following is an example of NO work being done?

• holding an object still above the floor of a room

• lifting an object from the floor of the room

• pushing an object across the floor of a room

• bouncing an object on the floor of a room

How does an inclined plane reduce the force required to do work?

• by changing the direction of the force applied

• by changing the distance of the weight from the fulcrum

• by increasing the distance moved by the force

• by increasing the height moved by the force

Which of the following is an example of work being done?

• standing at your desk

• holding a 100-pound barbell

• pushing against a stationary wall

• pushing a lawnmower 100 yards

Which statement if true about simple machines?

• The design of a simple machine increases the force needed to do work

• The design of a simple machine does not affect the amount of force to do work

• A simple mahine can be used to make work more difficult

Tags

NGSS.MS-PS2-2

Screws are used often in construction. A screw is an example of which type of simple machine?

• wheel and axle

• lever

• pulley

• inclined plane

What type of simple machine is a ramp?

• inclined plane

• lever

• pulley

• wheel and axle

What type of simple machine is a seesaw?

• wheel and axle

• inclined plane

• lever

• wedge

How can you make it easier to move a box up a ramp?

• increase the height of a ramp

• decrease the height of a ramp

• decrease the length of a ramp

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

What is the purpose of a pulley?

• slide a load up a ramp

• lift a heavy object

• separate or split two objects

• connect two objects together