In the following table, data related to the distances travelled by bodies A and B are reflected. Time 9.30 am 9.45 am 10.00 am 10.15 am 10.30 am 10.45 am Distance travelled by body A (meter) 10 20 30 40 50 60 Distance travelled by body B (meter) 10 17 23 35 40 45 Carefully observe the table and tell about the motion of the body whether it is uniform or non-uniform.

According to the given table, Time 9.30 am 9.45 am 10.00 am 10.15 am 10.30 am 10.45 am Distance travelled by body A (meter) 10 20 30 40 50 60 Distance travelled by body B (meter) 10 17 23 35 40 45 Body A is in uniform motion, because in every 15 min it is covering a distance of 10 m . In uniform motion, body covers equal distance in equal intervals of time. Body B is in non-uniform motion, because in every 15 min there is unequal amount of distance covered in an equal interval of time.

Obtain s = ut + 1 2 at 2 , where terms have their usual meanings.

Let initial velocity of a body is u . Final velocity of the body is v Acceleration of the body is a Displacement of the body is s Time taken is t To derive this equation, we will apply kinematic equations of motion Average velocity of the body v avg = u + v 2 Displacement, s = v avg × t = v + u 2 × t = u + u + at 2 × t where ( v = u + at ) s = ( 2 u + at ) 2 × t s = 2 ut 2 + at 2 2 s = ut + 1 2 at 2

MEDIUM

9th ICSE

IMPORTANT

Earn 100

A car travels with a uniform velocity of $30 m / s$ for $5 s$ . The brakes are then applied and the car comes to rest with a uniform retardation in a further $10 s$ . Draw a velocity-time graph and use it to find the distance with which the car travels after the brakes are applied.

Important Questions on Motion in One Dimension

MEDIUM

9th ICSE

IMPORTANT

Together With Physics Class 9>Chapter 2 - Motion in One Dimension>ILLUSTRATIVE NUMERICALS>Q 19

A car travels with a uniform velocity of

30 m / s

for

5 s

. The brakes are then applied and the car comes to rest with a uniform retardation in a further

10 s

. Draw a velocity-time graph and use it to find the distance travelled in first

5 s

, total distance travelled, acceleration during the first

5 s

and in last

10 s

MEDIUM

9th ICSE

IMPORTANT

Together With Physics Class 9>Chapter 2 - Motion in One Dimension>Self Evaluation Test>Q 1

In the following table, data related to the distances travelled by bodies A and B are reflected.

Time	9.30 am	9.45 am	10.00 am	10.15 am	10.30 am	10.45 am
Distance travelled by body A (meter)	10	20	30	40	50	60
Distance travelled by body B (meter)	10	17	23	35	40	45

Carefully observe the table and tell about the motion of the body whether it is uniform or non-uniform.

MEDIUM

9th ICSE

IMPORTANT

Together With Physics Class 9>Chapter 2 - Motion in One Dimension>Self Evaluation Test>Q 2

State the condition when the magnitude of average velocity of an object be equal to its average speed.

EASY

9th ICSE

IMPORTANT

Together With Physics Class 9>Chapter 2 - Motion in One Dimension>Self Evaluation Test>Q 3

How would you calculate the distance covered by a body in a given time interval from a speed-time graph?

EASY

9th ICSE

IMPORTANT

Together With Physics Class 9>Chapter 2 - Motion in One Dimension>Self Evaluation Test>Q 4

A railway train

200 m

long moves with a speed of

20 m / s

. Calculate the time taken in seconds by the train to cross a

800 m

long bridge.

MEDIUM

9th ICSE

IMPORTANT

Together With Physics Class 9>Chapter 2 - Motion in One Dimension>Self Evaluation Test>Q 5

Obtain

s = ut + \frac{1}{2} {at}^{2}

, where terms have their usual meanings.

MEDIUM

9th ICSE

IMPORTANT

Together With Physics Class 9>Chapter 2 - Motion in One Dimension>Self Evaluation Test>Q 6

A cyclist is cycling at a uniform rate of

8 m / s

for eight seconds. She then stops pedaling and the cycle comes to rest in the next ten seconds. Draw velocity-time graph. Also calculate the average velocity of the cyclist.

MEDIUM

9th ICSE

IMPORTANT

Together With Physics Class 9>Chapter 2 - Motion in One Dimension>Self Evaluation Test>Q 7

The brakes applied to a car produce a negative acceleration of $6 m s^{- 2}$ . If the car takes $2 s$ to stop after applying the brakes, calculate the distance travelled by car during this time in metre.

(Choose from the following: $12, 24, 6$ )

A car travels with a uniform velocity of 30 m/s for 5 s. The brakes are then applied and the car comes to rest with a uniform retardation in a further 10 s. Draw a velocity-time graph and use it to find the distance with which the car travels after the brakes are applied.

Important Questions on Motion in One Dimension

Learn and Prepare for any exam you want !

A car travels with a uniform velocity of $30 m / s$ for $5 s$ . The brakes are then applied and the car comes to rest with a uniform retardation in a further $10 s$ . Draw a velocity-time graph and use it to find the distance with which the car travels after the brakes are applied.