MEDIUM
JEE Main
IMPORTANT
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A projectile is projected with velocity of at an angle with the horizontal. After seconds its inclination with horizontal becomes zero. If represents horizontal range of the projectile, the value of will be : []
(a)
(b)
(c)
(d)

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Important Questions on Kinematics
MEDIUM
JEE Main
IMPORTANT
From the top of a tower, a ball is thrown vertically upward which reaches the ground in . A second ball thrown vertically downward from the same position with the same speed reaches the ground in . A third ball released, from the rest from the same location, will reach the ground in _____ s.

MEDIUM
JEE Main
IMPORTANT
An object of mass is thrown vertically upwards from the ground. The air resistance produces a constant retarding force of throughout the motion. The ratio of time of ascent to the time of descent will be equal to : [Use ].

EASY
JEE Main
IMPORTANT
A fly wheel is accelerated uniformly from rest and rotates through in the first second. The angle rotated by the fly wheel in the next second, will be :

HARD
JEE Main
IMPORTANT
A body is projected from the ground at an angle of with the horizontal. Its velocity after is . The maximum height reached by the body during its motion is _____ . (use )

EASY
JEE Main
IMPORTANT
is a vector quantity such that non-zero constant. Which of the following expression is true for ?

EASY
JEE Main
IMPORTANT
Which of the following relations is true for two unit vector and making an angle 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 and thrown with same velocity '' at two different angles with horizontal attained the same range . If A and reached the maximum height and respectively, then
Reason R: Product of said heights, .

MEDIUM
JEE Main
IMPORTANT
Two buses and start from a point at the same time and move in a straight line and their positions are represented by and . At what time, both the buses have same velocity ?
