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Question 18M.2.HL.TZ1.d

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.2.HL.TZ1.d
Level HL Paper 2 Time zone TZ1
Command term Suggest Question number d Adapted from N/A
d.
[Maximum mark: 2]
18M.2.HL.TZ1.d

An elastic climbing rope is tested by fixing one end of the rope to the top of a crane. The other end of the rope is connected to a block which is initially at position A. The block is released from rest. The mass of the rope is negligible.

M18/4/PHYSI/SP2/ENG/TZ1/01

The unextended length of the rope is 60.0 m. From position A to position B, the block falls freely.

The length reached by the rope at C is 77.4 m. Suggest how energy considerations could be used to determine the elastic constant of the rope.

[2]

Markscheme

k can be determined using EPE = 1 2 kx2

correct statement or equation showing

GPE at A = EPE at C

OR

(GPE + KE) at B = EPE at C

 

Candidate must clearly indicate the energy associated with either position A or B for MP2.

[2 marks]

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