Using Machines + Simple Machines
Question 1
A machine is any device that decreases the amount of work required.
True
False
Question 2
Machines will decrease the amount of work required but make the task harder.
True
False
Question 3
What will happen to the output distance from looking at the figure below?
The output distance will be longer than the input distance.
The output distance will be shorter than the input distance.
The output distance will be the same as the input distance.
The output distance will be best friend with the input distance.
Question 4
What will happen to the output distance from looking at the figure below?
The output distance will be longer than the input distance.
The output distance will be shorter than the input distance.
The output distance will be the same as the input distance.
The output distance will move to a song call "I like to move it"
Question 5
What will happen to the output distance from looking at the figure below?
The output distance will be longer than the input distance.
The output distance will be shorter than the input distance.
The output distance will be the same as the input distance.
The output distance will sing a Titanic song "My heart will go on"
Question 6
From looking at the figure below, which type of class lever is the figure represent?
First class
Second class
Third class
Fourth class
Question 7
From looking at the figure below, which type of class lever is the figure represent?
First class
Second class
Third class
Fourth class
Question 8
From looking at the figure below, which type of class lever is the figure represent?
First class
Second class
Third class
Fourth class
Question 9
In a first-class lever, mechanical advantage can be less than 1, equal to 1, or greater than 1.
True
False
Question 10
In a second-class lever, the mechanical advantage is less than 1.
True
False
Question 11
In a third-class lever, the mechanical advantage is greater than 1.
True
False
Question 12
A carpenter applies 525 N to the end of a crowbar. The force exerted on the board is 1,575 N. What is the mechanical advantage of the crowbar?
1
2
3
4
Question 13
A mechanic does 78.0 J of work pulling the rope on a pulley to lift a motor. The output work of the pulley is 64.0 J. What is the efficiency of the pulley?
92.1%
82.1%
72.1%
100.1%
Question 14
Which is not part of a machine that can make work easier?
Changing the size of a force
Changing the distance of the force acts
Changing the workload of the work
Changing the direction of a force
Question 15
The output work done by a machine sometimes will exceeds the input work of the machine.
True
False
Question 16
Output work is always less than input work, a machine’s efficiency is always less than 100 percent.
True
False
Question 17
What is the equation to solving the Ideal Mechanical Advantage of an Inclined Plane?
IMA = l/h
IMA = h/l
IMA = l x h
IMA = IMA
Question 18
What is the equation for solving the Ideal Mechanical Advantage of Wheel and Axle?
IMA = R axle + R wheel
IMA = R axle x R R wheel
IMA = R axle/R wheel
IMA = R wheel/R axle
Question 19
A crowbar is a good example of which class type of lever?
First class
Second class
Third class
Fourth class
Question 20
The point about which a lever pivot is called a fulcrum.
True
False