Question

4.
If momentum of an object is increased by 10% then its kinetic energy will increase by
(1) 20%
(2) 21%
(3) 40%
(4) 19%
addition chould be​

Answer 1

Answer:

2) 21%

Step-by-step explanation:

as the object mass is constant, the momentum is directly proportional to velocity. The kinetic energy is directly proportional to square of velocity. Thus, when we increase momentum by 10%, the velocity also increases by 10%, becoming 1.1 times its original velocity, and as kinetic energy is proportional to square of velocity, it will become 1.1²=1.21 times the original kinetic energy. Thus, the kinetic energy increase by a factor of 0.21, or 21%.

Answer 2

Answer:

b 21% please let know if u need explained one