MEDIUM
11th ICSE
IMPORTANT
Earn 100

A person standing on the roof of a building 30 m high drops a ball vertically downwards with an initial velocity of 500 cms-1. Acceleration due to gravity is 9.8 ms-2. What will be the velocity of the ball after 0.5 s?

Important Questions on Motion in One and Two Dimensions

EASY
11th ICSE
IMPORTANT
A person standing on the roof of a building 30 m high drops a ball vertically downwards with an initial velocity of 500 cms-1. Acceleration due to gravity is 9.8 ms-2. Where will be the ball after 1.5 s
EASY
11th ICSE
IMPORTANT
A person standing on the roof of a building 30 m high drops a ball vertically downwards with an initial velocity of 500 cms-1. Acceleration due to gravity is 9.8 ms-2. What will be the velocity of the ball striking the earth?
MEDIUM
11th ICSE
IMPORTANT
A boy standing on the top of a 40 m high building projects a stone vertically upwards with an initial velocity of 10 ms-1. The stone eventually falls to the ground.  After how long will the stone strike the ground?
MEDIUM
11th ICSE
IMPORTANT
A boy standing on the top of a 40 m high building projects a stone vertically upwards with an initial velocity of 10 ms-1. The stone eventually falls to the ground. After how long will the stone pass through the point from where it was projected?
EASY
11th ICSE
IMPORTANT
A boy standing on the top of a 40 m high building projects a stone vertically upwards with an initial velocity of 10 ms-1. The stone eventually falls to the ground.  With what velocity will it strike the ground?
MEDIUM
11th ICSE
IMPORTANT
A balloon, going upwards with a velocity of 12 ms-1, is at a height of 65 m from the earth at any instant. Exactly at this instant a packet drops from it. How much time will the packet take in reaching the earth?
MEDIUM
11th ICSE
IMPORTANT
An astronaut jumps from an aeroplane. After he had fallen 40 m, then his parachute opens. Now he falls with a retardation of 2.0 ms-2 and reaches the earth with a velocity of 3.0 ms-1. What was the height of the aeroplane?  For how long astronaut remained in air? 
MEDIUM
11th ICSE
IMPORTANT
When a balloon rising vertically upwards at a velocity of 10 ms-1 is at a height of 45 m from the ground, a parachutist bails out from the balloon. After 3 s, he opens the parachute and decelerates at a constant rate of 5 ms-2. What is the height of the parachutist above the ground when he opens the parachute?