Edexcel IGCSE Physics 5 Geometry and Trigonometry Questions

A student investigates the reflection of light by a plane mirror.
The student uses a ray box, a ruler, a pencil and a mirror.

The diagram shows a ray of light directed to a point on the mirror.

Measure the angle of incidence.

angle of incidence = ............ degrees

Diagram 1 shows the apparatus a student uses to investigate the bending of a wooden strip.

Part of the wooden strip is clamped to a table.
A load is fixed to the free end of the wooden strip, causing it to bend.

The free end of the wooden strip is positioned a length, L , beyond the edge of the table, as shown in diagram 1.

The weight of the load causes the end of the wooden strip to move down through a height, h.

A student investigates how the length, L , affects the height, h .

The table shows the results of the investigation.

Diagram 2 shows the wooden strip when $\mathrm{L}=80 \mathrm{~cm}$.

Using diagram 2, determine the height, h, in the laboratory.
[1 cm on the diagram = 10 cm in the laboratory]
height, h=
cm

A student investigates how much pressure she exerts on the ground when she is standing up.

The student measures the area of one of her feet when it is in contact with the ground. She draws around her foot on a piece of squared paper.

The squares on the paper have a side length of 2 cm.

Estimate the area of the student's foot in contact with the ground.

area = ............ cm^2