Questions
The kinetic energy acquired by a mass m in travelling a certain distance d, starting from rest, under the action of a force F such that the force F is directly proportional to t is
a
Directly proportional to r2
b
Independent of t
c
Directly proportional to t4
d
Directly proportional to t
detailed solution
Correct option is C
f = ktm∫0vdv=k∫0tt dtmv = kt2v=kmt2KE=12mv2=12mk2m2t4=k22mt4KE ∝ t4Talk to our academic expert!
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A light body A and a heavy body B have equal linear momentum. Then the KE of the body A is
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