WorksheetsSimple machines: pulley
Total questions: 30
Worksheet time: 15mins
What are two types of pulleys?
wings, fries
load. weight
fixed, movable
effort, force
What is the formula to calculate the MA (mechanical advantage) ?
MA= height/width
MA= load/effort
MA= R/R
MA= output force/input force
Pulleys make work:
Easier
Rigorous
How do pulleys make work easier?
they change the direction of a force
they change the amount of force required
the distance over which the force is applied
the measurement of an object
The opposite of input is:
output
force
What is a pulley?
a simple lifting machine consisting of a rope which unwinds from a wheel on to a cylindrical drum or shaft joined to the wheel to provide mechanical advantage.
a rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end when pressure is applied to the other.
a wheel with a grooved rim around which a cord passes. It acts to change the direction of a force applied to the cord and is chiefly used (typically in combination) to raise heavy weights.
a piece of wood, metal, or some other material having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them.
Identify the type of pulley
fixed
moveable
block and tackle or pulley system
Identify the type of pulley
Fixed
Moveable
Block and Tackle or pulley system
Identify the type of pulley
Block and Tackle or pulley system
Fixed
Moveable
A load of 650 newtons is lifted with this pulley. What is the effort required to do this work?
300
325
600
650
An effort of 450 newtons is applied to this pulley. What is the force of the load that will be lifted?
450
600
750
900
What is the ideal mechanical advantage of this pulley?
1
2
3
4
What is the effort required to lift a load of 170 newtons using this pulley system?
57
114
85
90
Bob uses a pulley to lift his car 5 meters, he uses a force of 935 N. How much work has Bob done?
78 joules
4,675 joules
2,437 joules
253 joules
Bill uses a pulley with 1 rope to lift a box. He applies a force of 126 N, the resistance force is also 126 N. If he adds another rope to his pulley, how much force does he need to apply this time?
504 N
2 N
252 N
63 N
What is the best method to lift a heavy object using a pulley while exerting the least force?
Adding more ropes to the pulley
Using only 1 rope on the pulley
What is the relation of the number of ropes on a pulley and the mechanical advantage?
The number of ropes is equal to the mechanical advantage
The number of ropes is greater than or equal to the mechanical advantage
The number of ropes is less than or equal to the mechanical advantage
There is no relation
If you decrease the amount of ropes on your pulley, how does the amount of force needed to apply change?
The force needed decreases
The force needed increases
The force needed doesn't change
Bob is using a pulley to lift something, he knows his effort force and the resistance force. How would he find his mechanical advantage?
By divding his effort force by his resistance force
By dividing his resistance force by his effort force
By multiplying his effort force and resistance force
There is not enough information
In a simple machine, what is the load?
point where the lever arm pivots
the force needed to move the load
the mass lifted by a system
the distance the load travels
In a simple machine, what is the effort?
the force needed to move the load
the distance the load travels
the mass lifted by a system
the object being moved
What is the unit used to measure force?
meter
gram
Newton
liter
How is a 2-pulley system more beneficial than a 1-pulley system?
It provides less mechanical advantage
It provides greater directional advantage
It provides less directional advantage
It provides greater mechanical advantage
Which of the following is NOT part of a pulley system?
rope
pulley
load
wedge
Which of thefollwoing is a good definition for a pulley?
a simple machine that uses a grooved rope to move a load
a simple machine that uses a rod, fulcrum. load and effort to move things
a simple machine that uses a rope, chain, or belt
Which of the following is an example of a pulley?
flag pole
see saw
jump rope
