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JEE Advanced

IMPORTANT

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A parachutist drops first freely from an aeroplane for $10 s$ and then his parachute opens out. Now he descends with a net retardation of $2.5 m s^{- 2}$ . If he bails out of the plane at a height of $2495$ $m$ and $g = 10 m s^{- 2}$ , his velocity on reaching the ground will be

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Important Questions on Kinematics I

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 4 - Kinematics I>Exercises>Q 36

A police party is chasing a dacoit in a jeep which is moving at a constant speed

v

. The dacoit is on a motorcycle. When he is at a distance

x

from the jeep, he accelerates from rest at a constant rate. Which of the following relations is true if the police are able to catch the dacoit?

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 4 - Kinematics I>Exercises>Q 37

A train is moving at a constant speed

v_{1}

when its driver observes another train in front of him on the same track and moving in the same direction with constant speed

v_{2}

. If the distance between the trains is

x

, then what should be the minimum retardation of the train to avoid a collision?

EASY

JEE Advanced

IMPORTANT

PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 4 - Kinematics I>Exercises>Q 38

A moving car possesses average velocities of

5 m s^{- 1}, 10 m s^{- 1}

, and

15 m s^{- 1}

in the first, second, and third seconds, respectively. What is the total distance covered by the car in these

3

s

EASY

JEE Advanced

IMPORTANT

PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 4 - Kinematics I>Exercises>Q 39

The average velocity of a body moving with uniform acceleration after travelling a distance of

3.06 m

0.34 m s^{- 1}

. If the change in velocity of the body is

0.18 m s^{- 1}

during this time, its uniform acceleration is

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 4 - Kinematics I>Exercises>Q 40

Water drops fall from a tap on the floor

5 m

below at regular intervals of time, the first drop striking the floor when the fifth drop begins to fall. The height at which the third drop will be from ground (at the instant when the first drop strikes the ground) will be

(g = 10 m s^{- 2})

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 4 - Kinematics I>Exercises>Q 41

Drops of water fall at regular intervals from roof of a building of height

H = 16 m

, the first drop striking the ground at the same moment as the fifth drop detaches itself from the roof. The distances between separate drops in air as the first drop reaches the ground are

MEDIUM

JEE Advanced

IMPORTANT

PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 4 - Kinematics I>Exercises>Q 42

A point moves in a straight line so that its displacement

x

meters at time

t

second is given by

x^{2} = 1 + t^{2}

. Its acceleration in

m s^{- 2}

at time

t

second is

HARD

JEE Advanced

IMPORTANT

PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 4 - Kinematics I>Exercises>Q 43

A point moves with uniform acceleration and

v_{1}, v_{2}

and

v_{3}

denote the average velocities in the three successive intervals of time

t_{1}, t_{2}

and

t_{3}

. Which of the following relations is correct?

A parachutist drops first freely from an aeroplane for 10 s and then his parachute opens out. Now he descends with a net retardation of 2.5 m s-2. If he bails out of the plane at a height of 2495 m and g=10 m s-2, his velocity on reaching the ground will be

Important Questions on Kinematics I

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A parachutist drops first freely from an aeroplane for $10 s$ and then his parachute opens out. Now he descends with a net retardation of $2.5 m s^{- 2}$ . If he bails out of the plane at a height of $2495$ $m$ and $g = 10 m s^{- 2}$ , his velocity on reaching the ground will be