Worksheetst-lvl yr 1 mechanical science principles
Total questions: 16
Worksheet time: 8mins
What is the unit of mass in the formula W = mg?
Newtons (N)
Kilograms (kg)
Meters (m)
Seconds (s)
Which of the following is a correct formula for work when including mass and gravity?
work = mass + gravity + distance
work = mass × gravity × distance
work = mass / gravity / distance
work = mass - gravity - distance
What does the formula "work = mass × gravity × distance" help determine?
The speed of an object
The force exerted on an object
The energy consumption
The temperature change
What is the relationship between kinetic and potential energy when a mass is raised to a fixed height ?
Kinetic energy is converted to potential energy
Potential energy is converted to kinetic energy
Both energies remain constant
Both energies decrease
What does the law of conservation of energy state?
Energy can be created and destroyed.
Energy can only be transformed from one form to another.
Energy is always lost in mechanical processes.
Energy is only used in electrical systems.
What is the formula for calculating efficiency?
% efficiency = (input power / output power) × 100
% efficiency = (output power / input power) × 100
% efficiency = (output power + input power) × 100
% efficiency = (input power - output power) × 100
If the output power is 100 and the input power is 220, what is the efficiency?
45.5%
50%
55%
60%
What is the term for energy turned into unwanted forms like noise or heat?
Energy conversion
Energy transformation
Energy losses
Energy gains
Which of the following is an example of energy transformation?
Electricity to light
Heat to sound
Sound to electricity
Light to heat
What happens when your weight pushes down on the floor?
The floor moves away
The floor pushes up against you with an equal force
The floor absorbs the weight
The floor changes color
What is the centre of gravity?
The point where an object is heaviest.
The point where the weight of an object is concentrated.
The point where an object is lightest.
The point where an object is most colorful.
How is torque measured?
In metres per second (m/s).
In newton-metres (Nm).
In kilograms (kg).
In joules (J).
What is the effect of a lever on the distance travelled, when mechanical advantage is in our favour compared to the load ?
It decreases the distance.
It increases the distance.
It has no effect on the distance.
It reverses the distance.
How many pulleys are there in a system if we only have to apply 25% of the effort compared to the load ??
Four
Two
Three
Five
What is the effect of friction on the efficiency of a machine?
Increases efficiency
Decreases efficiency
No effect on efficiency
Reverses efficiency
Which of the following is an example of potential energy?
A moving car
A stretched bow
A spinning top
A flowing river
