Neco Model Questions Vol1 2021 Physics Question 9
Practice objective / multiple choice question 9 from the 2021 Neco Model Questions Vol1 Physics examination.
In the diagram, a \(2.0\ \text{kg}\) block rests on a horizontal surface. It is attached to a spring of force constant \(k = 150\ \text{N m}^{-1}\) fixed to a wall on its left. A constant horizontal pulling force of \(50\ \text{N}\) acts to the right on the block. The coefficient of kinetic friction between the block and the surface is \(0.15\). The block is pulled so that the spring is stretched by \(0.40\ \text{m}\) from its unstretched length. (i) Find the work done by the pulling force. (ii) Determine the increase in the block's kinetic energy after the displacement.
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About This Question
This is Neco Model Questions Vol1 2021 Physics Question 9. It is one of the objective questions from the 2021 Neco Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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