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Your practical group is asked to consider the following situation:
A boy, James, holds a box of mass 1.5 kg stationary on a frictionless, inclined plane, by pushing it horizontally with a force F as shown in the diagram.
Your group is required to find the magnitude of F. In an attempt to solve the problem, Ebrahim proposes the following solution:
He draws a correct free body-diagram of the forces acting on the box and labels the forces as in the diagram:
Specify (name) the forces Ebrahim has labelled 1, T and 3. (3)
Ebrahim then says the force F exerted by James is given by N. Ebrahim has made two mistakes in his solution to the problem.
2. Identify Ebrahim’s mistakes and explain what he did wrong. (4)