1.

A toy car can deliver a constant power of `20W`. The resistive force on the car is `alphav`, where `v` is velocity of car in `m//s`. If maximum velocity of car is `2m//s`, the value of `alpha` is .A. `10 kg//s`B. `5kg//s`C. `15kg//s`D. `5 kg//s^(2)`

Answer» Correct Answer - B
At maximum velocity, Net force is zero
So `P=Fv=(alphav)vrArr20=alpha(2)^(2)rArralpha=5kg//s`


Discussion

No Comment Found

Related InterviewSolutions