Paper 1 H - SAMPLE SET 1 Q11
11) Figure 17 shows a student before and after a bungee jump.
The bungee cord has an unstretched length of 20.0 m.
The bungee cord has an unstretched length of 20.0 m.
The mass of the student is 50.0 kg.
The gravitational field strength is 9.8 N/kg.
11.1) Write down the equation which links gravitational field strength, gravitational potential energy, height and mass. [1 mark]
11.2) Calculate the change in gravitational potential energy from the position where the student jumps to the point 20.0 m below. [2 marks]
The gravitational field strength is 9.8 N/kg.
11.1) Write down the equation which links gravitational field strength, gravitational potential energy, height and mass. [1 mark]
11.2) Calculate the change in gravitational potential energy from the position where the student jumps to the point 20.0 m below. [2 marks]
Change in gravitational potential energy = _____________ J
11.3) 80% of this change in gravitational potential energy has been transferred to the student’s kinetic energy store.
How much has the student’s kinetic energy store increased after falling 20.0 m? [1 mark]
How much has the student’s kinetic energy store increased after falling 20.0 m? [1 mark]
Kinetic energy gained = __________ J
11.4) Calculate the speed of the student after falling 20.0 m.
Give your answer to two significant figures. [4 marks]
Give your answer to two significant figures. [4 marks]
Speed = __________ m/s
11.5) At the lowest point in the jump, the energy stored by the stretched bungee cord is 24.5 kJ.
The bungee cord behaves like a spring.
Calculate the spring constant of the bungee cord.
Use the correct equation from the Physics Equation Sheet. [3 marks]
The bungee cord behaves like a spring.
Calculate the spring constant of the bungee cord.
Use the correct equation from the Physics Equation Sheet. [3 marks]
Spring constant = __________ N / m
(Total for Question 11 = 11 marks)