What is effort (input) distance?

the distance that an input force acts through

A device that reduces the force over a greater distance

How do you find the MA of a pulley?

count all ropes except the effort rope

How can you increase the mechanical advantage of a lever?

move the fulcrum closer to the load

What is resistance (output) distance?

the distance an output force acts through

How does distance change the effort (input force) when using an inclined plane?

As distance increases, effort decreases

What is mechanical advantage?

The number of time a machine multiplies input force

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Work, MA, & Machines Test Review

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Questions 17

Answers

1
A wheel's radius is 8 m and the axle's radius is 4 m. What is the mechanical advantage? (MA = wheel radius/axle radius)
32
2
.5
2
A man weighing 600 N gets into an elevator and goes up 6 meters in 10 seconds. How much power was used? (P = W/t)
600 W
3600 W
360 W
60 W
3
What is effort (input) distance?
the distance that an input force acts through
the force you put on the machine
the distance that an output force acts through
input work times output distance
4
What is a machine?
An object with Artificial Intelligence
A device that decreases the amount of work done
A device that reduces the force over a greater distance
An object designed to take over the world in 2050
5
What is the equation for power?
P = Force/time
P = Work/time
P = distance/time
P = Work x time
6
How much work is done when 350 N is used to move a car 5 m? (W=F x d)
70 J
175 J
355 J
1750 J
7
How do you find the MA of a pulley?
count all the ropes
count all ropes except the effort rope
only count the effort ropes
8
Calculate the mechanical advantage of a ramp with a length of 12m and a height of 1.5m. (MA = length/height)
10.5
18
0.125
8
9
How can you increase the mechanical advantage of a lever?
make sure the fulcrum is in the middle of the lever
use a bigger fulcrum
move the fulcrum closer to the load
move the fulcrum closer to the input force
10
Input force is the same as __________.
output force
resistance force
effort force
total work done
11
What is resistance (output) distance?
the distance an input force moves a machine
the force you exert on a machine
distance you move an object due to work
the distance an output force acts through
12
What is the equation for work?
W = F x d
F = W x d
W = m x a
13
Resistance force is the same as __________.
output work times input distance
input force
the force exerted by a machine
the force you exert on a machine
14
How does distance change the effort (input force) when using an inclined plane?
Nothing, they both stay the same
As distance increases, effort increases
As distance increases, effort decreases
As distance decreases, effort decreases
15
What is the MA of a lever with an effort arm of 27 m and a resistance arm of 12 m? (MA = effort arm/resistance arm)
39
324
0.44
2.25
16
A 16 N force is applied to an object and 96 J of work is done. How far was the object moved? (W = F x d)
1536 m
16 m
6 m
80 m
17
What is mechanical advantage?
The number of time a machine multiplies input force
A measure of how much a simple machine reduces work
A measure of when is the best time to use a simple machine

Work, MA, & Machines Test Review Flashcards | StudBud