#9702_m23_qp_22
The base of the block takes a time of 0.49 s to move vertically upwards from level X to level Y at a constant speed of 0.64 m s–1. During this time the wire has a strain of 0.0012. The wire is made of metal of Young modulus 2.2 × 1011 Pa and has a uniform cross-section.
The block has a weight of 1.4 × 104 N.
Assume that the weight of the wire is negligible.
(a) Calculate:
(i) the cross-sectional area A of the wire
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#alevelphysics #9702/22/F/M/23 #9702