1.

If the force acting on a body is inversely proportional to its speed, then its kinetic energy is

Answer»

linearly RELATED to time 
inversely proportional to time 
inversely proportional to the square of time 
a constant 

Solution :`F prop 1/V " or " F = C/v`
where C is the constant of proportionality.
`:. ma= C/v " or " m (dv)/(dt) = C/v " or " vdv = (Cdt)/(m)`
Integrating both SIDES , we get `(v^2)/v = (Ct)/m " or " 1/2 mv^2 = Ct`
KINETIC energy, `K = 1/2 mv^2 = Ct or K prop t`


Discussion

No Comment Found