A particle is thrown upwards from ground it experiences a constant resistance force which can produce retardation of 2m/s^2 The ratio of time of ascent to the time to descent is (g=10m/s^ 2)

A particle is thrown upwards from ground. It experiences a constant resistance force which can produce a retardation of 2 ms^-2. The ratio of time of ascent to time of descent 13 ( g = 10 ms^-2 )

A particle is thrown upward from ground. It experiences a constant resistive force which can produce retardation of 6 m/ sec^2 . What will be the ratio of time of descent to time of ascent (g = 10 m/ sec^2 )

A particle is thrown vertically upward from the ground with some velocity and it strikes the ground again in time 2 s. The maximum height achieved by the particle is : (g=10 m//s^(2))

A particle has initial velcoity 10m//s . It moves due to constant retarding force along the line of velocity which produces a retardation of 5m//s^(2) . Then

A particle starts with a velocity of 2m//s and moves in a straight line with a retardation of 0.1m//s^(2) . The time that it takes to describe 15m is

A particle has initial velocity 12 m//s . It moves due to a constant force along the line of velocity which initially produces retardation of 8 m//s^(2) . Then :

(a) A ball is thrown vertically upward with speed 10 m//s and it returns to the ground with speed 8 m//s . Find the maximum height attained by the ball. (b) A ball is thrown vertically upward and if air resistance is half of weight of the ball, find the ratio of time of ascent and time of descent. (C) Two balls A and B (m_(A) = 2 m_(B) = 2 m) are thrown vertically upward. If air resistance is mg//2 , find ratio of maximum height attained by them.

In the following problems the air resistance is constant (air resistance always opposes the motion). (a) A ball is thrown vertically upward. If time of ascent is t_(1) and time of descent is t_(2) , which time is greater ? (b) A ball is thrown vertically upward with speed u and on returning to the ground, its speed is v_(0) . Which speed is greater ? (c) Two balls A and B (m_(A) gt m_(B)) are thrown vertically upward with same speed. Which ball A or B (heavier or lighter) wil attain greater height ?

" A person in a lift which ascends up with acceleration "10m/s^(2)" drops a stone from a height "10m" .Time of descent is "

A particle is projected from ground with velocity 40sqrt2m at 45^(@) .At time t=2s