Figure shows the displacement of a body at different times Calculate the average velocity during the time interval 5 s to 9 s .

Average velocity is given as the following formula Average velocity = D i s p a l c e m e n t i n t h e g i v e n i n t e r v a l t i m e i n t e r v a l Displacement covered during the time interval 5 s to 9 s is 7 - 3 = 4 m , time interval 9 - 5 = 4 s Average velocity = 4 4 = 1 m s - 1

A body is at rest is made to fall from the top of a tower. Its displacement at different instants is given in the following table Time (in s ) 0 . 1 0 . 2 0 . 3 0 . 4 0 . 5 0 . 6 Displacement (in m ) 0 . 05 0 . 20 0 . 45 0 . 80 1 . 25 1 . 80 Draw a displacement-time graph and state whether the motion is uniform or non-uniform?

The displacement-time graph is shown below : The motion is uniform as the displacement-time graph is a curve.

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For the uniform motion :

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Important Questions on Motion in One Dimension

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Concise Physics I.C.S.E Part I For Class 9>Chapter 2 - Motion in One Dimension>EXERCISE–2(B)>Q 1

Figure (a) shows the displacement-time graph for the motion of a body. Use it to calculate the velocity of a body $t = 1 s, 2 s$ and $3 s$ , then draw the velocity-time graph for it in figure (b).

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Concise Physics I.C.S.E Part I For Class 9>Chapter 2 - Motion in One Dimension>EXERCISE–2(B)>Q 4

Figure shows the displacement of a body at different times

Question Image

Calculate the average velocity during the time interval $5 s$ to $9 s$ .

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Concise Physics I.C.S.E Part I For Class 9>Chapter 2 - Motion in One Dimension>EXERCISE–2(B)>Q 7

A body is at rest is made to fall from the top of a tower. Its displacement at different instants is given in the following table

Time (in $s$ )	$0.1$	$0.2$	$0.3$	$0.4$	$0.5$	$0.6$
Displacement (in $m$ )	$0.05$	$0.20$	$0.45$	$0.80$	$1.25$	$1.80$

Draw a displacement-time graph and state whether the motion is uniform or non-uniform?

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Concise Physics I.C.S.E Part I For Class 9>Chapter 2 - Motion in One Dimension>EXERCISE–2(B)>Q 8

The figure shows velocity-time graph for the motion of a body. Use it to find the displacement of the body at $t = 1 s, 2 s, 3 s$ and $4 s$ , then draw displacement-time graph for it on figure (b).

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Concise Physics I.C.S.E Part I For Class 9>Chapter 2 - Motion in One Dimension>EXERCISE–2(B)>Q 11

A ball moves on a smooth floor in a straight line with a uniform velocity

10 m s^{- 1}

for

6 s

. At

t = 6 s

, the ball hits a ball and come back along the same line to the starting point with same speed. Draw the velocity-time graph and use it to find the total distance travelled by the ball and its displacement.

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Concise Physics I.C.S.E Part I For Class 9>Chapter 2 - Motion in One Dimension>EXERCISE–2(C)>Q 1

Write three equations of uniformly accelerated motion relating the initial velocity

(u)

, final velocity

(v)

, time

(t)

, acceleration

(a)

and displacement

(s)

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Concise Physics I.C.S.E Part I For Class 9>Chapter 2 - Motion in One Dimension>EXERCISE–2(C)>Q 3

Write an expression for the distance

S

covered in time

t

by a body which is initially at rest and starts moving with a constant acceleration

a

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Concise Physics I.C.S.E Part I For Class 9>Chapter 2 - Motion in One Dimension>EXERCISE–2(C)>Q 1

The correct equation of motion is :

For the uniform motion :

Important Questions on Motion in One Dimension

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