Question

Asked Sep 8, 2019

Step 1

Normal force always acts perpendicular to the surface.

Step 2

- For the block sliding down a frictionless plane, normal force and the component of gravitational force perpendicular to the plane cancels each other. The block moves at a constant speed. Thus, the only force is the force due to the component of gravitational force along the plane.
- For a block in the mid-air, shortly after it is thrown, it is the only under the influence of gravitational force which points directly downwards.
- For the block sliding down a frictionless plane, normal force and the component of gravitational force perpendicular to the plane cancels each other. The block moves at a constant speed. Thus, the only force is the force due to the component of gravitational force along the plane.
- For a block in the mid-air, at the...

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