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Question 18M.2.SL.TZ1.1b.i

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.2.SL.TZ1.1b.i
Level SL Paper 2 Time zone TZ1
Command term Determine Question number b.i Adapted from N/A
b.i.
[Maximum mark: 2]
18M.2.SL.TZ1.1b.i

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.

At position C the speed of the block reaches zero. The time taken for the block to fall between B and C is 0.759 s. The mass of the block is 80.0 kg.

(b.i)

Determine the magnitude of the average resultant force acting on the block between B and C.

[2]

Markscheme

use of impulse Fave × Δt = Δp

OR

use of F = ma with average acceleration

OR

F =  80.0 × 34.3 0.759

 

3620«N»

 

Allow ECF from (a).

[2 marks]

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