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11th Mizoram Board

IMPORTANT

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Figure shows the $x - t$ plot of one-dimensional motion of a particle. Is it correct to say from the graph that the particle moves in a straight line for $t < 0$ and on a parabolic path for $t > 0$ ? If not, suggest a suitable physical context for this graph.

Important Questions on Motion in a Straight Line

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11th Mizoram Board

IMPORTANT

PHYSICS PART 1 TEXTBOOK FOR CLASS XI>Chapter 3 - Motion in a Straight Line>EXERCISES>Q 3.18

A police van moving on a highway with a speed of

30 k m h^{- 1}

fires a bullet at a thief's car speeding away in the same direction with a speed of

192 k m h^{- 1}

. If the muzzle speed of the bullet is

150 m s^{- 1}

, with what speed does the bullet hit the thief's car ? (Note: Obtain that speed which is required for damaging the thief's car).

EASY

11th Mizoram Board

IMPORTANT

PHYSICS PART 1 TEXTBOOK FOR CLASS XI>Chapter 3 - Motion in a Straight Line>EXERCISES>Q 3.19

Suggest a suitable physical situation for each of the following graphs figure:
a
Question Image

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11th Mizoram Board

IMPORTANT

PHYSICS PART 1 TEXTBOOK FOR CLASS XI>Chapter 3 - Motion in a Straight Line>EXERCISES>Q 3.2

Figure given shows the

x - t

plot of a particle executing one-dimensional simple harmonic motion. Give the signs of position, velocity and acceleration variables of the particle at

t = 0.3 s, 1.2 s, - 1.2 s

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11th Mizoram Board

IMPORTANT

PHYSICS PART 1 TEXTBOOK FOR CLASS XI>Chapter 3 - Motion in a Straight Line>EXERCISES>Q 3.21

Figure given shows the

x - t

plot of a particle in one-dimensional motion. Three different equal intervals of time are shown. In which interval is the average speed greatest, and in which is it the least? Give the sign of average velocity for each interval.
Question Image

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11th Mizoram Board

IMPORTANT

PHYSICS PART 1 TEXTBOOK FOR CLASS XI>Chapter 3 - Motion in a Straight Line>EXERCISES>Q 3.22

Figure gives a speed-time graph of a particle in motion along a constant direction. Three equal intervals of time are shown. In which interval is the average acceleration greatest in magnitude? In which interval is the average speed greatest? Choosing the positive direction as the constant direction of motion, give the signs of

v

and

a

in the three intervals. What are the accelerations at the points

A, B, C

and

D

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11th Mizoram Board

IMPORTANT

PHYSICS PART 1 TEXTBOOK FOR CLASS XI>Chapter 3 - Motion in a Straight Line>EXERCISES>Q 3.23

A three-wheeler starts from rest, accelerates uniformly with

1 m s^{- 2}

on a straight road for

10 s

, and then moves with uniform velocity. Plot the distance covered by the vehicle during the

n

th second

(n = 1,2, 3 \dots .)

versus

n

. What do you expect this plot to be during accelerated motion: a straight line or a parabola?

MEDIUM

11th Mizoram Board

IMPORTANT

PHYSICS PART 1 TEXTBOOK FOR CLASS XI>Chapter 3 - Motion in a Straight Line>EXERCISES>Q 3.24

A boy standing on a stationary lift (open from above) throws a ball upwards with the maximum initial speed he can, equal to

49 m / s

. How much time does the ball take to return to his hands? If the lift starts moving up with a uniform speed of

5 m / s

and the boy again throws the ball up with the maximum speed he can, how long does the ball take to return to his hands?

EASY

11th Mizoram Board

IMPORTANT

PHYSICS PART 1 TEXTBOOK FOR CLASS XI>Chapter 3 - Motion in a Straight Line>EXERCISES>Q 3.25

On a long horizontally moving belt (Figure), a child runs to and fro with a speed $9 k m h^{- 1}$ (with respect to the belt) between his father and mother located $50 m$ apart on the moving belt. The belt moves with a speed of $4 k m h^{- 1}$ . For an observer on a stationary platform outside, what is the
(a) speed of the child running in the direction of motion of the belt ?
(b) speed of the child running opposite to the direction of motion of the belt ?
(c) time taken by the child in (a)and (b)?
Which of the answers alter if motion is viewed by one of the parents?
Question Image

Figure shows the x-t plot of one-dimensional motion of a particle. Is it correct to say from the graph that the particle moves in a straight line for t<0 and on a parabolic path for t>0? If not, suggest a suitable physical context for this graph.

Important Questions on Motion in a Straight Line

Learn and Prepare for any exam you want !

Figure shows the $x - t$ plot of one-dimensional motion of a particle. Is it correct to say from the graph that the particle moves in a straight line for $t < 0$ and on a parabolic path for $t > 0$ ? If not, suggest a suitable physical context for this graph.