1 Fig. 1 shows a block of mass \(M \mathrm {~kg}\) being pushed over level ground by means of a light rod. The force, \(T \mathrm {~N}\), this exerts on the block is along the line of the rod.
The ground is rough.
The rod makes an angle \(\alpha\) with the horizontal.
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\caption{Fig. 1}
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- Draw a diagram showing all the forces acting on the block.
- You are given that \(M = 5 , \alpha = 60 ^ { \circ } , T = 40\) and the acceleration of the block is \(1.5 \mathrm {~ms} ^ { - 2 }\). Find the frictional force.