Machines
Physics ⇒ Mechanics
Machines starts at 6 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Machines.
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See sample questions for grade 7
A seesaw is an example of which class of lever?
Describe how a wheel and axle works as a simple machine.
Describe the role of friction in the working of machines.
Explain how a pulley makes lifting a load easier.
A lever has an input force of 10 N and an output force of 50 N. What is its mechanical advantage?
A lever is used to lift a 100 N load with an effort of 25 N. What is the mechanical advantage?
A pulley system allows you to lift a 200 N load with an effort of 50 N. What is the mechanical advantage?
A ramp is 4 meters long and 1 meter high. What is its mechanical advantage?
Which class of lever has the load between the fulcrum and the effort?
(1) First-class
(2) Second-class
(3) Third-class
(4) Fourth-class
Which of the following is a compound machine?
(1) Scissors
(2) Ramp
(3) Pulley
(4) Lever
Which of the following is an example of a first-class lever?
(1) Nutcracker
(2) Crowbar
(3) Tweezers
(4) Wheelbarrow
Which of the following is an example of a wedge?
(1) Knife
(2) Pulley
(3) Screw
(4) Wheelbarrow
Fill in the blank: A _______ is a simple machine that consists of a wheel with a rope around it.
Fill in the blank: A _______ is a simple machine that is made of two inclined planes joined back to back.
Fill in the blank: A _______ is a simple machine that is used to split or cut objects apart.
Fill in the blank: The _______ is the force applied to a machine.
True or False: A broom is an example of a third-class lever.
True or False: A doorknob is an example of a wheel and axle.
True or False: A fixed pulley changes the direction of the force applied.
True or False: A screw is a type of inclined plane.
