Question 4
The diagram below shows a gymnast on a trampoline. At position A in Figure 4.1, the gymnast starts to rise. She passes through B in Figure 4.2 and reaches her maximum height at C.
(a) (i) State the form of energy stored in the stretched springs shown in Figure 4.1. [1 point]
(ii) State the form of energy gained by the gymnast between B and C. [1 point]
(b) The gymnast has a mass of 45.0 kg. When the gymnast is at B, her speed is 10.0 m/s. Calculate her kinetic energy at point B. [1.5 points]
(c) The energy stored in the stretched springs shown in Figure 4.1 is greater than 2250 J. Explain. [1.5 points]
(a) (i) State the form of energy stored in the stretched springs shown in Figure 4.1. [1 point]
(ii) State the form of energy gained by the gymnast between B and C. [1 point]
(b) The gymnast has a mass of 45.0 kg. When the gymnast is at B, her speed is 10.0 m/s. Calculate her kinetic energy at point B. [1.5 points]
(c) The energy stored in the stretched springs shown in Figure 4.1 is greater than 2250 J. Explain. [1.5 points]