WorksheetsMTL2 Science Learner Outcome 5
Total questions: 9
Worksheet time: 5mins
What is the main purpose of a simple machine?
To reduce the size of a load
To increase the weight of a load
To multiply the effort or force applied
To measure the velocity of a load
Which type of lever has the fulcrum positioned between the effort and the load?
First class lever
Second class lever
Third class lever
Compound lever
Which of the following is an example of a second class lever?
Scissors
Crowbar
Wheelbarrow
Fishing rod
In a four pulley system, what percentage of the load is supported by each rope?
50%
33%
25%
10%
What does Newton’s 3rd Law of Motion state?
Force equals mass times acceleration
Energy cannot be created or destroyed
For every action, there is an equal and opposite reaction
Objects in motion stay in motion
What is the formula for calculating the moment of force (torque)?
Moment = Mass × Acceleration
Moment = Force × Distance
Moment = Pressure ÷ Area
Moment = Velocity × Time
What does it mean when an object is in a state of equilibrium?
All forces acting on it are unbalanced
The object is accelerating
All forces acting on it are equal and balanced
The object is rotating
Which of the following would cause an object to move out of equilibrium?
Equal forces acting in all directions
Unequal forces acting in one direction
Balanced forces acting vertically
Equal forces acting horizontally
What is the centre of gravity of an object?
The point where the object touches the ground
The point where all the weight of the object is concentrated
The highest point of the object
The point where the object is the widest
