GCSE|Edexcel|Physics P2H (Nov 2020)

In which of these could the forces acting on a seesaw be in equilibrium?

• A

• B

• C

• D

Explain why it is easier to close the door by pushing at point P rather than

pushing at point Q.

Explain how the student could measure the volume of the piece of copper.

The mass of the piece of copper is 0.058kg.

The volume of the piece of copper is 6.5×10^–6 cubic metre.

Calculate the density of copper.

Calculate a value for the specific heat capacity of copper, using these results.

Use the equation:

change in thermal energy = mass × specific heat capacity × change in temperature

ΔQ = m×c×Δθ

The value for the specific heat capacity of copper obtained from the student’s results is lower than the correct value.

State two ways that the experiment could be improved to give a value that is closer to the correct value.

Figure 7 shows a drone.

Describe the relationship between upward force and speed shown by this graph.

A different drone has a mass of 4.5kg.

This drone rises from the ground to a height of 20m.

Calculate the change in gravitational potential energy when the drone rises through a height of 20m.

The gravitational field strength g = 10N/kg.

State the amount of useful work done by the blades as the drone rises through 20m in joule.