Two particles A and B , move with constant velocities v → 1 and v → 2 . At the initial moment, their position vectors are r 1 → and r 2 → , respectively. The condition for particles A and B for their collision is:

r 1 → – r 2 → r 1 → – r 2 → = v 2 → – v 1 → v 2 → – v 1 →

r 1 → – r 2 → = v 1 → – v 2 →

r 1 → · v 1 → = r 2 → · v 2 →

r 1 → × v 1 → = r 2 → × v 2 →

EASY

NEET

IMPORTANT

Earn 100

A particle of unit mass undergoes one-dimensional motion such that its velocity varies according to $v (x) = β x^{- 2 n}$ , where ( $β$ and $n$ are constants and $x$ is the position of the particle. The acceleration of the particle as a function of $x$ is given by:

50% studentsanswered this correctly

Important Questions on Kinematics

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Assertion & Reason)>Q 4

A ship

A

is moving westwards with a speed of

10 km h^{- 1}

and a ship

B

which is

100 km

south of

A

is moving northwards with a speed of

10 km h^{- 1}

. The time after which the distance between them becomes shortest is,

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Assertion & Reason)>Q 5

Two particles

A

and

B

, move with constant velocities

{\vec{v}}_{1}

and

{\vec{v}}_{2}

. At the initial moment, their position vectors are

\vec{r_{1}}

and

\vec{r_{2}}

, respectively. The condition for particles

A

and

B

for their collision is:

HARD

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Assertion & Reason)>Q 6

If the velocity of a particle is

v = A t + B t^{2},

where

A

and

B

are constants, then the distance travelled by it between

1 s

and

2 s

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Assertion & Reason)>Q 7

Two cars

P

and

Q

start from a point at the same time in a straight line and their positions are represented by

x_{p} (t) = a t + b t^{2}

and

x_{Q} (t) = f t - t^{2}

. At what time do the cars have the same velocity?

HARD

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Assertion & Reason)>Q 8

Preeti reached the metro station and found that escalator was not working. She walked up the stationary escalator in time

t_{1}

on other days, if she remains stationary on the moving escalator, then the escalator takes her up in time

t_{2}

. The time taken by her to walk up on the moving escalator will be

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Assertion & Reason)>Q 9

The

x

and

y

coordinates of the particle at any time are

x = 5 t - 2 t^{2}

and

y = 10 t

, respectively, where

x

and

y

are in

meters

and

t

seconds

. The acceleration of the particle at

t = 2 s

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Assertion & Reason)>Q 10

Position of a particle moving along

x

-axis is given by

x = 2 + 8 t - 4 t^{2}

. The distance travelled by the particle from

t = 0

t = 2

is:

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Assertion & Reason)>Q 11

The position vector of a particle is given by

\vec{r} = \vec{r_{0}} (1 - a t) t

, where

t

is time and

a

as well as

\vec{r_{0}}

are constant. After what time does the particle return to the starting point?

A particle of unit mass undergoes one-dimensional motion such that its velocity varies according to vx=βx–2n, where (β and n are constants and x is the position of the particle. The acceleration of the particle as a function of x is given by:

Important Questions on Kinematics

Learn and Prepare for any exam you want !

A particle of unit mass undergoes one-dimensional motion such that its velocity varies according to $v (x) = β x^{- 2 n}$ , where ( $β$ and $n$ are constants and $x$ is the position of the particle. The acceleration of the particle as a function of $x$ is given by: