Questions
A particle moves in the xy-plane under the action of a force F such that the components of its linear momentum p at any time t are . The angle
between F and p at time t is
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Correct option is A
Given that p→=pxi^+pyj^=2costi^+2sintj^∴ F→=dp→dt=−2sinti^+2costj^ Now, F→⋅p→=0 i.e. angle between F→ and p→ is 90∘Similar Questions
A bomb of mass 30 kg at rest explodes into two pieces of masses 18 kg and 12 kg. The velocity of 18 kg mass is 6 ms-1 . The kinetic energy of the other mass is
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