Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 64

MEDIUM

JEE Main/Advance

IMPORTANT

Earn 100

A person travelling on a straight line without changing direction moves with a uniform speed $v_{1}$ for half distance and next half distance he covers with uniform speed $v_{2}$ . The average speed $v$ is given by

83.33% studentsanswered this correctly

Important Questions on Kinematics

MEDIUM

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 65

A body covers first

\frac{1}{3}

part of its journey with a velocity of

2 m s^{- 1}

, next

\frac{1}{3}

part with a velocity of

3 m s^{- 1}

and the rest of the journey with a velocity

6 m s^{- 1} .

The average velocity of the body will be

MEDIUM

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 66

A car runs at constant speed on a circular track of radius

100 m

taking

62.8 s

on each lap. What is the average speed and average velocity on each complete lap?

(π = 3.14)

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 67

The displacement of a body is given by

2 s = g t^{2}

where

g

is a constant. The velocity of the body at any time

t

is:

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 68

A stone is thrown vertically upward with an initial speed

u

from the top of a tower, reaches the ground with a speed

3 u

. The height of the tower is:

MEDIUM

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 69

A particle starts from rest with uniform acceleration

a

. Its velocity after

n

seconds is

v

. The displacement of the particle in the last two seconds is:

HARD

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 70

A body starts from rest and is uniformly accelerated for $30 s$ . The distance travelled in the first $10 s$ is $x_{1}$ , next $10 s$ is $x_{2}$ and the last $10 s$ is $x_{3}$ . Then $x_{1} : x_{2} : x_{3}$ is the same as

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 71

A ball is dropped from the top of a building. The ball takes

0.5 s

to fall past the

3 m

height of a window some distance from the top of the building. If the speed of the ball at the top and at the bottom of the window are

v_{T}

and

v_{B}

respectively, then

(g = 9.8 m s^{- 2})

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise - 1>Q 72

A stone is released from an elevator going up with acceleration

a

and speed

u

. The acceleration and speed of the stone just after the release is