Simple Machines - JSS2 Basic technology Past Questions and Answers - page 1
Which of the following is not a type of lever?
First-class lever
Second-class lever
Third-class lever
Fourth-class lever
In a first-class lever, where is the fulcrum located?
Between the effort and the load
Between the load and the effort
At one end
At the centre of the load
Which simple machine consists of a wheel with a grooved rim and a rope?
Lever
Pulley
Gear
Wheel and axle
What is the main function of gears in machinery?
To change the direction of force
To lift heavy loads
To transmit motion and force
To cut materials
Which type of pulley reduces the amount of input force needed to lift a load?
Fixed pulley
Movable pulley
Compound pulley
Friction pulley
In which class of lever is the load between the fulcrum and the effort?
First-class lever
Second-class lever
Third-class lever
Fourth-class lever
What is an example of a third-class lever?
Seesaw
Nutcracker
Tweezers
Crowbar
Which simple machine is used in elevators to lift the car up and down?
Lever
Pulley
Gear
Inclined plane
Which type of lever is a pair of scissors?
First-class lever
Second-class lever
Third-class lever
Fourth-class lever
What is the primary purpose of a lever?
To transmit motion
To change the direction of force
To increase speed
To increase force