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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When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 6
Describe how a pulley helps in lifting a heavy object.
Explain how a wheel and axle makes work easier.
Explain what a wedge is and give one example.
Explain why a longer lever makes it easier to lift a heavy object.
A lever has a load of 20 N and requires an effort of 5 N to lift it. What is the mechanical advantage? (Mechanical advantage = load / effort)
A person uses a crowbar (a first-class lever) to lift a rock. If the fulcrum is closer to the rock, does it require more or less effort to lift the rock?
A ramp is 4 meters long and rises 1 meter high. What is the mechanical advantage of the ramp? (Mechanical advantage = length of ramp / height of ramp)
A student wants to lift a heavy box into a truck using a ramp. The box weighs 100 N, and the student applies a force of 25 N along the ramp. What is the mechanical advantage of the ramp?
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) Wedge
Which of the following is an example of a screw?
(1) Hammer
(2) Light bulb base
(3) Pulley
(4) Knife
Which of the following is an example of a third-class lever?
(1) Crowbar
(2) Fishing rod
(3) Nutcracker
(4) Scissors
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 a flat surface set at an angle.
Fill in the blank: A __________ is a simple machine that is thick at one end and thin at the other, used for splitting or cutting.
Fill in the blank: A __________ is a simple machine that is used to hold things together or lift objects by turning.
True or False: A fixed pulley changes the direction of the force applied.
True or False: A lever can only be used to lift objects.
True or False: A machine can multiply both force and distance at the same time.
True or False: A nutcracker is an example of a second-class lever.
