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 car travels half the distance with a constant velocity of 40 m//s and the remaining half with a constant velocity of 60 m//s . The average velocity of the car in m//s is

A car of mass m has an engine which can deliver constant power P.the maximum speed that the car can attain in t seconds in

A person observes a change of 2.5 % in frequency of sound of horn of a car. If the car is approaching forward the person & sound velocity is 320 m/s, then velocity of car in m/s will be approximaterly :-

A person observes a change of 2.5 % in frequency of sound of horn of a car. If the car is approaching forward the person & sound velocity is 320 m/s, then velocity of car in m/s will be approximaterly :-

A car of mass M is accelerating on a level smooth road under the action of a single force F acting along the direction of motion. The power delivered to the car is constant and equal to p. If the velocity of the car at an instant is v, then after travelling a distance of (7 Mv^3)/(3p) the velocity become kv where k is__________.

A car of mass M is accelerating on a level smooth road under the action of a single force F acting along the direction of motion. The power delivered to the car is constant and equal to p. If the velocity of the car at an instant is v, then after travelling a distance of (7 Mv^3)/(3p) the velocity become kv where k is__________.

On a straight road, two cars X and Y are moving in the same direction, Velocity of car X is 20m/s and that of car Y is15 m/s. Find the velocity of X relative to Y and vice versa.

The car A of mass 1500 kg, travelling at 25 m/s collides with another car B of mass 1000 kg travelling at 15 m/s in the same direction. After collision the velocity of car A becomes 20 m/s. Calculate the velocity of car B after the collision.

Engine of a car supplies constant power to the car which accelerates from rest. Car moves along a straight road. If velocity and displacement of car at any time t be v and s respectively then