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WorksheetsSIMPLE MACHINES AND MECHANICAL ADVANTAGE
Total questions: 18
Worksheet time: 2hrs 30mins
A lever type 1 with a length of 1.2 meters has an input arm length of 80 cm are used to lift a fallen tree, which has a weight of 480 N.
What is the input force that will begin lifting the tree off the ground?
32,000 N
320 N
240 N
960 N
This 2000 N weight is raised 1 meter by pulling 4 meters of rope. What force was required to pull the rope?
If a pulley system has a mechanical advantage of 4, what does that mean?
This means that it is 4 times easier to lift this load.
This means you only need a quarter of the effort to lift the load.
For example, if you lifted 100 kg, it would only take 25 kg of effort.
All of the above
Which gear train would you use to apply the force necessary to ride up a hill?
A
B
If the small gear is driving the large gear, what is happening to the torque (TRACCION)?
Torque is increasing
Torque is decreasing
Torque remains constant
Not enough information to answer the question
A simple gear train is composed of three gears. Gear A is the driver and has 60 teeth, gear B has 40 teeth, and gear c has 15 teeth. If the output at gear C is 300 RPM, what is the input torque at gear A?
600 RPM
1200 RPM
75 RPM
2400 RPM
A compound gear train is composed of four gears: A, B, C, and D. Gear A has 12 teeth. Gear B has 24 teeth and shares a shaft with gear C, which has 8 teeth. Gear C is meshed with gear D, the output gear. Power is supplied at gear A with 200 ft. lb of torque and is traveling at 400 rpm. With a torque output of 2400 ft lb, how many teeth should gear D have?
144
12
24
48
In a pulley system, pulley A is moving at 600 rpm and has a diameter of 12 in. Three pulleys B, C, and D, all of different sizes are attached to a single output shaft. Speed and torque output are changed within the system by moving the drive belt between pulleys B, C, and D. A speed of 1200 rpm is required when the drive belt is connected to pulley B. What is the diameter of pulley B?
2
4
6
8
TYPE OF LEVER?
1
2
3
TYPE OF LEVER?
1
2
3
TYPE OF LEVER?
1
2
3
What is mechanical advantage?
The advantage a machine has over a bicycle
A measure of how much a complex machine reduces work
A measure of when is the best time to use a simple machine
the number of times a machine increases input force
What is effort (input) force?
the force one exerts on a machine
the force which an effort force must overcome in order to do work on an object via a simple machine.
the force the machine exerts on a object
the output work times the input distance
A box is lifted by a force F using a lever as shown below.
What is the mechanical advantage of the lever ?
0.5
2
3
6
Jeff is a landscaping contractor and lifts a rock weighing 600 Newtons by wedging a board under the rock. Jeff weighs 150 Newtons and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?
0
2
4
0.25
