Motion in A Str...

A body of mass $$500 g$$ is thrown upward with a velocity $$20 m/s $$ and reaches back to the surface of  a planet after $$20$$ sec Then the weight of the body on that planet is :

A particle experiences constant acceleration for $$20$$ seconds after starting from rest. If it travels a distance $$s_1$$ in the first $$10$$ seconds and distance $$s_2$$ in the next $$10$$ second then:

Two particles start moving from the same point along the same stright line. The first moves with constant velocity v and the second with constant acceleration a. During the time that elapses before the second catches the first, the greater distance between the particles is

A body lying initially at point (3, 7) starts moving with a constant acceleration of 4i. Its position after 3 s is given by the co-ordinates:

If a car at rest accelerates uniformly to a speed of 144 km$$h^{-1}$$ in 20 s, then it covers a distance of:

A $$50-kg$$ crate is being pushed across a horizontal floor by a horizontal force of $$575\ N$$. If the coefficient of sliding friction is $$0.25$$, what is the acceleration of the crate?

An object moving with an speed of 25 m/s is decelerating at a rate given by $$a = -5\sqrt{v}$$, where v is speed at any time. The time taken by the object to come to rest is:

Two bikes $$A$$ and $$B$$ start from a point. A move uniform speed $$40\ m/s$$ $$B$$ starts from rest with uniform acceleration $$2\ m/s^{2}$$. If $$B$$ starts at $$t = 0$$ and $$A$$ starts from the same point at $$t = 10\ s$$, then the time interval during the journey in which $$A$$ was ahead of $$B$$ is

A particle $$P$$ starts from the origin with velocity  $$\overset{\rightarrow}{u}=(2\hat{i}-4\hat{j})m/s$$ with constant acceleration $$(3\hat{j}-5\hat{j}) m/s^2$$ after travelling for $$2$$ second its distance from the origin is 

A particle starts from rest, accelerates at $$2\ m/s^{2}$$ for $$10s$$ and then goes for constant speed for $$30s$$ and then decelerates at $$4\ m/s^{2}$$ till it stops. What is the distance travelled by it?