Question

5. A uniform bar of mass m is being moved on a smooth horizontal plane by applying a constant horizontal force
Facting at the lowest point. If the rod translates making a constant angle with vertical, the value of F
must be​

Answer 1

If the rod translates making a constant angle with vertical, the value of F must be ma cosec θ

Given-

• Mass of uniform bar = m
• Horizontal force = F
• Angle with vertical = θ
• Angle with horizontal = 90 - θ

Bar is moving with an acceleration of a (let)

From the Newtons second law of motion-

F cos (90 - θ) = ma

F sin θ = ma

F = ma/sin θ

F = ma cosec θ

Answer 2

Explanation:

here , N is normal reaction

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