Motion in A Str...

Two particle P and Q are initially $$40m$$ apart P behind Q . Particle P starts moving with a uniform velocity $$10m/s$$ towards Q . Particle Q starting from rest has an acceleration $$2ms^2$$ in  the direction of velocity of P. Then the minimum distance between P and Q will be  

A man throws balls with the same speed vertically upwards one after the other at an interval of $$2$$ second. What should be the speed of the throw so that more than two balls are in sky at any time? (Given $$g=9.8$$ $${m/s^2}$$)

A particle moves along a straight line with a uniform acceleration $$-5m/s^{2}$$ and initial velocity $$12.25/s$$ distance traveled by it in $$3rd$$ second

A mass of $$3\ kg$$ descending vertically downward support a mass of $$2\ kg$$ by means of a light string passing over a pulley. At the end of $$5\ s$$ the string breaks. How much high from now the $$2\ kg$$ mass will go ? ($$g=9.8\ m/s^{2}$$)

A ball is thrown upwards with a speed of $$50 m/s$$. Find the distance travelled by the ball in last $$2 s$$ of its ascent. (Take $$10 m/s^2$$)

A parachutist after bailing out falls 80 m without air resistance. Then the parachute is opened, and he decelerates at a uniform rate of $$2 m/s^2$$. If he reaches the ground with a speed of $$4 m/s$$, then the height at which he bailed out is [$$g = 10 m/s^2$$]

A train is at rest. It accelerates for a time $$t_1$$ at a uniform rate $$\alpha$$ and the comes to rest under a uniform retardation rate $$\beta$$ in time.$$t_2$$. $$\dfrac{t_1}{t_2}$$ is equal to 

If a body starts from rest,the time in which it covers a particular displacement with uniform acceleration 

A stone is thrown vertically upwards. On its way, passes a point P with a speed $$v$$ and point Q is $$20 m$$ higher than Q with a speed $$\cfrac{\sqrt{5}}{3}v$$. The value of speed: [$$g = 10 m/s^2$$]

A body moving with uniform retardation covers $$3\ km$$ before its speed is reduced to half of its initial value. It comes to rest in another distance of :