WorksheetsSimple Machines
Total questions: 25
Worksheet time: 13mins
The efficiency of a machine is computed as_____.
Simple machines can be broadly categorized into ____ types.
four
two
three
six
Pick the correct statement related to the “pulley”.
MA of a single movable pulley is less than that of a single fixed pulley
Pulley helps to apply effort in a convenient direction.
A single fixed pulley has a MA of 2.
A single movable pulley has a MA of 1.
Identify the first order lever from the set of images.
Railway signal
Nut cracker
Fishing rod
Cork screw
Ravi exerts 100 kgf force to push a load on an inclined plane. If the mechanical advantage of the simple machine is 2, what is the magnitude of the load that Ravi has moved?
2000 kgf
20 kgf
50 kgf
200 kgf
In a nut and bolt, one inclined plane is on the ______ side of the solid cylinder called _____ and another inclined plane is in the______ side of the hollow cylinder called ______.
exterior, nut, inner, bolt
exterior, bolt, inner, nut
inner, nut, exterior, bolt
inner, bolt, exterior, nut
A scissor whose shears are longer, has a mechanical advantage ____ .
greater than one
lesser than one
equal to one
which is not defined
The wheelbarrow is a ____ class lever.
first
second
third
both first and second
Identify the correct equation to represent the principle of lever.
Effort * Effort arm = Load * Load arm
Effort * Load arm = Load * Effort arm
Load * Effort = Load arm * Effort arm
Effort * Load arm = Effort * Effort arm
Match the following:
{i-I, ii-II, iii-III}
{i-II, ii-III, iii-IV, iv-I}
{i-II, ii-I, iii-III}
{i-III, ii-II, iii-I}
The friction at the fulcrum ____ the mechanical advantage of the lever.
increases
does not affect
reduces
doubles
Kirti held a 10 cm long fishing rod and was trying to lift a 0.25 gf fish. What is the effort that she had to apply if she was holding the fishing rod at a distance of 5m from the fulcrum?(hint: Fishing rod is a 3rd order lever and the length of the load arm is the length of the rod)
1 gf
0.5 gf
5 gf
50 gf
What is a flat circular disc that has a groove in its edge, and which is capable of rotating around a fixed point passing through its central axis, called?
Wheel and axle
Wheel
Screw
Pulley
A bread knife can be used as a _____ multiplier.
force
speed
distance
energy
To increase the mechanical advantage of a lever, _____
load should be the same as effort.
the effort arm should be shorter than the load arm.
load should be lesser than effort applied.
the effort arm should be longer than the load arm.
Which of the following simple machines will have a mechanical advantage greater than 1?
A crane is a machine that is made up of two simple machines named _____ and _____.
inclined plane, wedge
wedge, screw
wheel and axle, lever
lever, pulley
A nutcracker has a mechanical advantage of 3. What is the effort applied if it can crack a nut offering a resistance of 3 kgf?
0.1 kgf
6 kgf
9 kgf
1 kgf
Which of these simple machines is a third order lever?
Hand pump
Row boat
Shovel
Claw hammer
In the human body, _____ acts like a first order lever.
leg
neck
arm
hip
A/An ____ changes the direction of the applied force.
inclined plane
screw
pulley
wedge
_____ the wedge, _____ it is to drive the wedge into a solid object.
Thinner, difficult
Broader, easier
Thinner, easier
Broader, difficult
Vignesh is in a wheelchair. He has to climb 5 steps to reach the foyer of his house. His brother Kamal brings a simple machine that will help Vignesh. Which one is it?
Inclined plane
screw
pulley
lever
If a machine converts 70 units of input energy into useful work, what is the efficiency of the machine?
70 N
30 N
30
70
In operating a water pump, a resistance of 500 N is overcome by an effort of 100 N. If the same machine was used to overcome a load of 300 N, what would he effort applied have been?
500 N
5 N
60 N
50 N
