The x-axis measures time so find the number of divisions or squares for one cycle and then use the ‘timebase’ of 0. b The area of the rectangle represents the displacement if the object had moved at a steady speed u for time t. You should be familiar with this equation, but note that it only applies close to the Earth’s surface where g is roughly constant.

a State whether the volume of the gas will increase or decrease as the temperature increases at constant pressure. c In your triangle, the forces will have the same directions as in the free body diagram but they will be shown head-to-tail. c The aircraft flies in a direction such that the wind is blowing at it sideways (in other words, at 90°).e Mark on your diagram the letter A at all the places where the resultant wave always has a maximum amplitude. At certain values of the oscillator frequency, stationary waves are formed; the different stationary waves have different wavelengths. The model can be used to explain many phenomena, and this exercise develops an understanding of the model at its simplest.

The frequency of sound from the loudspeaker is gradually increased and the next mode of vibration is found. This diagram shows the path of a projectile – in this case, an arrow – fired at 45° to the horizontal with an initial velocity of 24 m s −1. a Calculate the cross-sectional area of the wire if it is made of a material of resistivity 5 × 10−7 Ω m. d State two differences between the patterns seen when the double slits and the diffraction grating are used.a The formula for the cell is E = V + Ir Using the graph, copy and complete this table to show the values of the three terms. This is an exercise in calculating and using gravitational field strength for different objects in the solar system. To cool a 5 kg block of steel at a temperature of 200 °C, it is plunged into a tank containing 50 kg of water at 20 °C.