HARD

11th ICSE

IMPORTANT

Earn 100

A body is at rest at $x = 0$ . At $t = 0$ , it starts moving in the positive $X$ direction with a constant acceleration. At the same instant another body passes through $x = 0$ moving in the positive $X$ direction with a constant speed. The position of the first body is given by $x_{1} (t)$ after time t and that of the second body by $x_{2} (t)$ after the same time interval. Which of the following graphs correctly describes $(x_{1} - x_{2})$ as a function of time $t$ ?

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Important Questions on Motion in One and Two Dimensions

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 8 - Motion in One and Two Dimensions>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 14

A particle is moving such that its position coordinates

(x, y)

are

(2 m, 3 m)

at time

t = 0

(6 m, 7 m)

at time

t = 2 s

and

(13 m, 14 m)

at time

t = 5 s

. Average velocity vector

(\vec{v_{a v}})

from

t = 0

t = 5 s

is:

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 8 - Motion in One and Two Dimensions>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 15

A particle moves in a straight line with a constant acceleration. It changes its velocity from

10 m s^{- 1}

20 m s^{- 1}

while passing through a distance

135 m

In t second. The value of

t

is:

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 8 - Motion in One and Two Dimensions>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 16

From a tower of height

H

, a particle is thrown vertically upwards with a speed

u

. The time taken by the particle, to hit the ground, is

n

times that taken by it to reach the highest point of its path. The relation between

H

u

and

n

is :

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 8 - Motion in One and Two Dimensions>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 17

A car moving with a speed of

40 km h^{- 1}

is stopped in

2 m

distance when brakes are applied. If the speed be increased to

80 km h^{- 1}

, the stopping distance would be:

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 8 - Motion in One and Two Dimensions>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 18

Two balls are thrown from the top of a tower, one straight down with an initial velocity

u

and the other straight up with the same velocity

u

. They hit the ground with speeds in the ratio:

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 8 - Motion in One and Two Dimensions>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 19

A small block slides down a smooth inclined plane, starting from rest at time

t = 0

. Let

s_{n}

is the distance travelled by the block in the interval

t = n - 1

t = n

. Then, the ratio

\frac{s_{n}}{s_{n + 1}}

is:

EASY

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 8 - Motion in One and Two Dimensions>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 20

The distance travelled by a particle starting from rest and moving with an acceleration

\frac{4}{3} m s^{- 2}

3^{r d}

second is

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 8 - Motion in One and Two Dimensions>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 21

An object, moving with a speed of

6.25 {ms}^{- 1}

, is decelerated at a rate given by

\frac{d v}{d t} = - 2.5 \sqrt{v}

, where

v

is the instantaneous speed. The time taken by the object, to come to rest, would be:

Important Questions on Motion in One and Two Dimensions

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