Physics Principles: Forces and Motion

What law of physics have we been learning about?

What is the formula for calculating acceleration?

Which of the following is an example of a first-class lever?

• Wheelbarrow

• Scissors

• Nutcracker

• Fishing rod

What is the mechanical advantage of a pulley system with 4 supporting ropes?

• 1

• 2

• 3

• 4

How is work calculated in physics?

• Work = Force × Distance

• Work = Mass × Acceleration

• Work = Power × Time

• Work = Energy × Time

What is the unit of power in the International System of Units (SI)?

• Joule

• Watt

• Newton

• Pascal

If a machine has an efficiency of 75%, what does this mean?

• 75% of the input energy is wasted

• 75% of the input energy is converted to useful work

• The machine operates at 75% of its maximum speed

• The machine can only be used 75% of the time

Where is the centre of gravity located in a uniform, symmetrical object?

• At the top

• At the bottom

• At the geometric centre

• At one end

What is the moment of torque if a force of 10 N is applied at a distance of 2 m from the pivot?

• 5 Nm

• 10 Nm

• 20 Nm

• 40 Nm

Which of the following best describes displacement?

• The total distance travelled

• The change in position of an object

• The speed of an object

• The time taken to travel a distance