Machines
Physics ⇒ Mechanics
Machines starts at 6 and continues till grade 12.
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See sample questions for grade 8
A man uses a crowbar to lift a heavy box. In this scenario, what type of simple machine is the crowbar acting as?
A ramp is an example of which simple machine?
Describe how a wedge makes work easier.
Explain the difference between a fixed pulley and a movable pulley.
A block and tackle system uses 4 pulleys. What is the ideal mechanical advantage?
A lever has an input arm of 2 m and an output arm of 4 m. What is its mechanical advantage?
A lever is used to lift a 50 N load with an input force of 10 N. What is the mechanical advantage?
A machine requires 100 J of input work to do 80 J of output work. What is its efficiency?
Which class of lever has the fulcrum between the effort and the load?
(1) First class
(2) Second class
(3) Third class
(4) Fourth class
Which of the following is a compound machine?
(1) Knife
(2) Bicycle
(3) Pulley
(4) Lever
Which of the following is a second-class lever?
(1) Scissors
(2) Wheelbarrow
(3) Fishing rod
(4) Crowbar
Which of the following is an example of a wedge?
(1) Knife
(2) Pulley
(3) Screw
(4) Wheelbarrow
A lever is a type of ______ machine.
A screw is a type of ______ machine.
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 thick at one end and tapers to a thin edge at the other end.
True or False: A fixed pulley changes the direction of the force applied but does not change the amount of force needed.
True or False: A machine can multiply both force and distance at the same time.
True or False: A pair of scissors is an example of a compound machine.
True or False: A screw is a modified form of an inclined plane.
