Motion in A Str...

A 75.0 kg man stands on a platform scale in an elevator. starting from rest, the elevator ascends, attaining its maximum speed of 1.20 m/s in 1.00 s. It travels with this constant speed for the next 10.00 s. The elevator then undergoes a uniform acceleration in the negative y direction for 1.70 s and comes to rest. What does the scale register before the elevator starts to move?

A particle starts from the origin with a velocity of $$ 10 ms^{-1} $$ and moves with a constant acceleration till the velocity increases to $$ 50 ms^{-1} $$ . at that instant, the acceleration is suddenly reversed. what will be the velocity of the particle, when it returns to the starting point?

An object is dropped from the top of a tower. the distance it covers in the last second is seven time the distance it covered in the first second . find the time of flight

A lift coming down is just about to reach the ground floor. Taking the ground floor as origin and positive direction upwards for all quantities, which of the following is correct ($$x$$=displacement, $$v$$= velocity, $$a$$=acceleration):

A particle is moving in x-y plane . At certain instant of time. The components of its velocity and acceleration are as follows $$V_x = 3\ m/s$$, $$V_y = 4\ m/s$$, $${ a }_{ x }=2\ m/s^{ 2 }$$ and $${ a }_{ y }=1\ m/s^{ 2 }$$. The rate of change of speed at this moment is 

Is it possible for an object's velocity to increase while its acceleration decreases?

The position-time $$(x - t)$$ graph for a body thrown vertically upwards from ground is best shown by 

An object starts from rest at the origin and moves along the x-axis with constant acceleration of $$4 \ m/s^2$$. Its average velocity as it goes from x = 2m to x = 8m is

A body falls from rest under gravity and covers a distance $$44.1\ m$$ in last one second of journey. If $$g = 9.8\ m/s^2$$ then total time of fall is.

A body moves $$4 m \text { in } 3 ^ { r d }$$ and $$12 m \text { in } 5 ^ { th }$$ second. If the motion is uniformly accelerated, how far will it travel in next $$3$$ seconds to be constant during entire motion.