Question

kinetic energy acquired by body of mass m after travelling in fixed distance from rest under the action of a constant force will be

a) directly proportional to mass m

b)inversely proportional to mass m

c) inversely proportional to mass m to the power 12

d) independent of mass m

Answer 1

⭕️we know that :-

➖Acceleration=a=FM

➖ F = Constant force

➖M = Mass of the body

➖Velocity acquired after travelling a fixed distance

 d : v=u²+2as  

=2+2FMd  

=2FdM

⭕️Kinetic energy acquired:KE

=12Mv²  

=12M²FdM²     

 =12M²FdM     

 =Fd      

therefore. option. c is. perfect!

Answer 2

c. inversely. proportional. to. mass. m. to. the. power. 12