subject

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. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 6
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)
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.
Name any two simple machines.
What is a simple machine?
What is the difference between a simple machine and a compound machine?
What is the function of an inclined plane?
What is the main difference between a fixed pulley and a movable pulley?
What is the main purpose of using a machine?
A lever is used to lift a box weighing 60 N. If the effort applied is 15 N, what is the mechanical advantage of the lever? (Mechanical advantage = load / effort)
A ramp is 6 meters long and rises to a height of 2 meters. Calculate the mechanical advantage of the ramp.
A student uses a movable pulley to lift a 40 N load. If the effort required is 20 N, what is the mechanical advantage of the pulley?
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?
Describe how a pulley system with more than one pulley can make lifting a heavy object easier than using a single pulley.
Explain why using a longer handle on a wrench makes it easier to loosen a tight bolt.