MEDIUM
JEE Main/Advance
IMPORTANT
Earn 100

A man is going up in a lift (open at the top) moving with a constant velocity of 3 ms-1. He throws a ball up at 5 ms-1, relative to the lift. When the lift is 50 m above the ground, what would be the height of the lift when the ball meets it?

50% studentsanswered this correctly

Important Questions on Kinematics

EASY
JEE Main/Advance
IMPORTANT
A retarding force is applied to stop a train. The train stops after 80 m. If the speed is doubled, then the distance travelled when the same retarding force is applied is
EASY
JEE Main/Advance
IMPORTANT
A man walks 40 m north then, 30 m east and then 40 m south. Find the displacement from the starting point(in m and towards east).
HARD
JEE Main/Advance
IMPORTANT
Which of the following sets of displacements might be capable of bringing a car to its returning point?
HARD
JEE Main/Advance
IMPORTANT
A hunter at the bottom of a slant hill is trying to shoot a deer on a hill. The distance of the deer along his line of sight is 10181 m and the height of the hill is 90 m. His gun has a muzzle velocity of 100 m s-1. Minimum how many meters above the deer should he aim his rifle in order to hit it? g=10 m s-2
HARD
JEE Main/Advance
IMPORTANT
A stone is thrown in such a manner that it would just hit a bird at the top of a tree and afterwards reach a maximum height double that of the tree. If at the moment of throwing the stone the bird flies away horizontally with constant velocity and the stone hits the bird after some time. The ratio of the horizontal velocity of stone to that of the bird is 1n+1n. Find 2n.
MEDIUM
JEE Main/Advance
IMPORTANT

If 4 s be the time in which a projectile reaches a point P of its path and 5 s the time from P till it reaches the horizontal plane passing through the point of projection. The height of P above the horizontal plane (in m ) will be,

g=9.8 m sec-2

HARD
JEE Main/Advance
IMPORTANT
A person standing on the top of a cliff 30 m high has to throw a packet to his friend standing on the ground 40 m horizontally away. If he throws the packet directly aiming at the friend with a speed of 1253 m s-1. Packet falls at a distance 20α m from the friend. Here α is an integer. Find α  Use g=10 m s-2
HARD
JEE Main/Advance
IMPORTANT

A particle is projected from a point (0,1) on Y -axis (assume +Y direction vertically upwards) aiming towards a point (4, 9). It falls on the ground on x axis in 1 sec. If the speed of projection is β m s-1 where β  is an integer. Find β.

Take g=10 m s-2 and all coordinate in metres.