Laws of Motion-Equilibrium of Concurrent Forces (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 4 - 7 of 7

Question

An object is tied to a string and rotated in a vertical radius r. Constant speed is maintained along the trajectory. If, then, is –

(T indicates tension in the string)

Question

Figure shows a girder supporting a load of 20,000 N. The compression force F in newton in the girder is –

Question

Consider the system shown below.

A horizontal force F is applied to a block X of mass 8 kg such that the block Y of mass 2 kg adjacent to it does not slip downwards under gravity. There is no friction between the horizontal plane and the base of the block X. The coefficient of friction between the surfaces of blocks X and Y is 0.5. Take acceleration due to gravity to be 10 ms^–2. The minimum value of F is,

Question

A monkey is accelerating down a string whose breaking strength is one half of his weight. The minimum acceleration of the monkey should be,