Work and Simple Machines

Work

100

If Susie runs holding her sister is work done?

YES

200

If 3N of force is used to kick a ball 5m, how much work is done?

15J

300

If 60 Joules of work is done of 5 meters, how much force was used?

12 N

400

If 2.6 J of work was done over 3m, how much force was used?

0.867N

500

If a 3.4 Kg ball accelerates at 2.2m/s² for 4m, how much work is done?

29.92 J

IMA

100

IMA measures the mechanical advantage without

friction

200

An incline plane has a height of 5 and a slope of 10. What's the IMA?

2

300

A pulley with 4 ropes and 3 wheels has an IMA of

4

400

A bike's wheel has a radius of 4m and an axle's radius of 5m. What is the IMA?

0.8

500

If a lever's IMA is 3 and the input arm length is 4m, what is the output arm length?

1.33m

Simple Machines

100

Axes and knives are examples of

wedges

200

Ferris wheels, bicycles, and faucets are examples of

wheel and axles

300

levers with the ______ in the middle are

a. effort

b. fulcrum

c. load

a. 3rd

b. 1st

c. 2nd

400

A pulley where the wheel moves up and down the rope is 

a moveable pulley

500

Ashley opened her door (1), twisted the knobs to turn on the sink (2) to wash her hands, rolled up her blinds (3), and used a knife to cut an orange for a snack (4). What simple machines did she use?

1. wheel and axle

2. wheel and axle

3. fixed pulley

4. wedge

Random

100

Incline planes increase the ___________ of a force.

distance

200

Screws and wedges

a. increase the distance of a force

b. change the direction of the force

c. increase the force applied

B

300

Give me the units for the following:

Work

Distance

Force

Joules

Meters

Newtons

400

A machine has an input work of 5348J and an output work of 4859 J. What is the efficiency?

90.86%

500

If a machine's efficiency is 68% and the output work is 400J, what is the input work?

588.24J