Motion in A Str...

A constant force acting on a body of mass of 5kg change its speed from 5 $$ms^{-1}$$ to 10 $$ms^{-1}$$ in 10 s without changing the direction of motion. The force acting on the body is

The motion of particle of mass m is given by $$y=ut+\frac{1}{2}gt^2$$. The force acting on the particle is  

What is the acceleration of the race car that moves at constant velocity of 300 km/hr ?

A bullet is fired from the cart vertically at the same instant cart begins to accelerate forward. Which of the following best describes the subsequent motion of the bullet?

The displacement of a body is given by $$s=\dfrac{1}{2}gt^{2}$$, where $$g$$ is acceleration  due to gravity. The velocity of the body at any time $$t$$ is 

A bullet moving with a speed of $$100ms^{-1}$$ can just penetrate into two planks of equal thickness. Then the number of such planks, if speed is double will be:

A bird flies for 4 s with a velocity of $$\left| {t - 2} \right|m/s$$ in a straight
line,Where t is time in seconds.It covers a distance of

At any instant, the velocity and acceleration of a particle moving along a straight line v and a. The speed of the particle is increasing if

Consider a train which can accelerate with an acceleration of $$20cm/s^2$$ and slow down with deceleration of $$100cm/s^2$$. Find the minimum time for the train to travel between the stations 2.7km apart.

A ball with a mass of 0.5 Kg is thrown vertically upward with a speed of 15 m/s. What are its speed and direction two seconds later ?