HARD
JEE Main
IMPORTANT
Earn 100

A body is projected from the ground at an angle of 45° with the horizontal. Its velocity after 2 s is 20 m s-1. The maximum height reached by the body during its motion is _____ m. (use g=10 m s-2)

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Important Questions on Kinematics

EASY
JEE Main
IMPORTANT
Which of the following relations is true for two unit vector A^ and B^ making an angle θ to each other?
MEDIUM
JEE Main
IMPORTANT

Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Two identical balls A and B thrown with same velocity 'u' at two different angles with horizontal attained the same range R. If A and B reached the maximum height h1 and h2 respectively, then R=4h1h2

Reason R: Product of said heights, h1h2=u2sin2θ2g·u2cos2θ2g.

MEDIUM
JEE Main
IMPORTANT
Two buses P and Q start from a point at the same time and move in a straight line and their positions are represented by xPt=αt+βt2 and xQt=ft-t2. At what time, both the buses have same velocity ?
EASY
JEE Main
IMPORTANT
For a particle in uniform circular motion, the acceleration a at any point PR,θ on the circular path of radius R is (when θ is measured from the positive x-axis and v is uniform speed):
MEDIUM
JEE Main
IMPORTANT
A ball is projected vertically upward with an initial velocity of 50 m s-1 at t=0 s. At t=2 s, another ball is projected vertically upward with same velocity. At t=____s, second ball will meet the first ball g=10 m s-2.
EASY
JEE Main
IMPORTANT
An object is thrown vertically upwards. At its maximum height, which of the following quantity becomes zero ?
EASY
JEE Main
IMPORTANT
A fighter jet is flying horizontally at a certain altitude with a speed of 200 m s-1. When it passes directly overhead an anti-aircraft gun, a bullet is fired from the gun, at an angle θ with the horizontal, to hit the jet. If the bullet speed is 400 m s-1, the value of θ will be _____ °.
EASY
JEE Main
IMPORTANT
A ball of mass 0.5 kg is dropped from the height of 10 m. The height, at which the magnitude of velocity becomes equal to the magnitude of acceleration due to gravity, is _____ m. [Use g=10 m s-2 ]