A coin is dropped in a lift. It takes ti...

A coin is dropped in a lift. It takes time `t_1` to reach the floor, when lift is stationary. It takes time `t_2`, when lift is moving up with constant acceleration. Then,

`t_1gtt_2`

`t_1ltt_2`

`t_1=t_2`

None of these.

Text Solution

Verified by Experts

Topper's Solved these Questions

Centre of mass
MODERN PUBLICATION|Exercise Exercise|30 Videos
Dynamics of Circular Motion
MODERN PUBLICATION|Exercise Exercise|81 Videos

Similar Questions

Explore conceptually related problems

Determine aparent weight of a person in a lift lift is moving up with acceleration a

What is the nature of acceleration-time graph when the body moves with constant acceleration ?

Determine aparent weight of a person in a lift when lift to moving down with acceleration a,

Determine aparent weight of a person in a lift when lift is moving down with a = g.

Determine aparent weight of a person in a lift when lift is moving upward with unifrom velocity

Determine aparent weight of a person in a lift when lift is moving downward with uniform velocity.

A man weighs 70 kg. He stands on a weighing scale in a lift which is moving? upwards with a uniform acceleration of 5 ms^-2 .

A boy standing on a stationary lift (open from above) throws a ball upwards with the maximum initial speed he can, equal to 49 m s^-1 . How much time does the ball take to return to his hands? If the lift starts moving up with a uniform speed of 5 m s^-1 and the boy again throws the ball up with the maximum speed he can, how long does the ball take to return to his hands ?

A man of mass 70 kg stands on a weighing scale in a lift which is moving :- downwards with a uniform acceleration of 5 m s^-2 ,

When a body slides down from rest along a smooth inclined plane making anangle of 45^@ with the horizontal, it takes time T. when the same body slides down from rest along a rough inclined plane making the same angle and through the same distance, it is seen to take time pT, where p is some number greater than 1. Calculate the co-efficient of friction between the body and the rough plane.

MODERN PUBLICATION-Competitive Exam Question-Exercise

A bird weights 2 kg and is inside a cage of 1 kg. If it starts flying ...
Text Solution
|
A man is standing on a spring platform. Reading of spring balance is 6...
Text Solution
|
A coin is dropped in a lift. It takes time t1 to reach the floor, when...
Text Solution
|
A smooth inclined plane of length L ahving inclination theta with the ...
Text Solution
|
A machine gun has a mass of 5 kg. It fires 50 g bullets at the rate of...
Text Solution
|
A body of mass M at rest explodes into three masses, two of which of m...
Text Solution
|
A particle is projected with 200 ms^(-1) at an angle 60^@. At the high...
Text Solution
|
A jet engine works on the principle of conservation of
Text Solution
|
Which of the following works on the principle of conservation of linea...
Text Solution
|
Which one is the self-adjusting force ?
Text Solution
|
A block moving up at theta=30^@ with a velocity 5 m s^(-1), stops afte...
Text Solution
|
A car of mass m is moving with momentum p. If mu be the coefficient of...
Text Solution
|
A block of mass 60 kg just slides over a horizontal distance of 0.9 m....
Text Solution
|
A rough vertical board has an acceleration a long the horizontal, so t...
Text Solution
|
Force responsible for the circular motion of the body is :
Text Solution
|
Two particles of equal masses are revolving in circular paths of radii...
Text Solution
|
A body of mass 5 kg is moving in a circle of radius 1 m with an angula...
Text Solution
|
A car is moving along a circular road at a speed of 20 m s^(-1). The r...
Text Solution
|
The earth ( mass=6xx10^24kg) revolves around the sun with an angular v...
Text Solution
|
A cyclist moves in a circular track of radius 100 m. If the coefficien...
Text Solution
|