1.1. Figure 2 below shows a student doing a bungee jump from a stationary platform.

The bungee cord has an unstretched length of 30.0 m.

Figure 2

The mass of the student is 60.0 kg.

The gravitational field strength is 9.8 N / kg.

Write down the equation which links gravitational field strength (g), gravitational potential energy (E_p), height (h) and mass (m).

1.2. Using the equation from 1(a), calculate the change in gravitational potential energy from the position where the student jumps to the point 30.0 m below.

Give your answer to 3 significant figures.

1.3. 75% of this change in gravitational potential energy is transferred to the student’s kinetic energy store.

By how much does the student’s kinetic energy store increase after falling 30.0 m?

Kinetic energy gained = ________________________ J

1.4. Calculate the speed of the student after falling 30.0 m.

Give your answer to two significant figures.