मराठी
तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएस.एस.एल.सी. (इंग्रजी माध्यम) इयत्ता ७

A car starts from rest and it is travelling with a velocity of 20 m/s in 10 s. What is its acceleration? - Science

Advertisements
Advertisements

प्रश्न

A car starts from rest and it is travelling with a velocity of 20 m/s in 10 s. What is its acceleration?

टीपा लिहा

उत्तर

Given :
Initial velocity of the car (u) = 0 m/s
Final velocity of the car (v) = 20 m/s
time taken = 10s
Acceleration = ?
Formula:

Acceleration = \(\frac {20– 0}{10}\) = \(\frac {20}{10}\)

Acceleration of the car = 2 m/s2

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Force and Motion - Evaluation [पृष्ठ २६]

APPEARS IN

सामाचीर कलवी Science - Term 1 [English] Class 7 TN Board
पाठ 2 Force and Motion
Evaluation | Q VIII. 2. | पृष्ठ २६

संबंधित प्रश्‍न

Define the term acceleration due to gravity. State its average value.


Figure given below shows a velocity-time graph for a car starting from rest. The graph has three parts AB, BC and CD.

Which part of graph shows motion with uniform
(a) velocity (b) acceleration (c) retardation ?


A bullet initially moving with a velocity 20 m/s strikes a target and comes to rest after penetrating  a  distance  10  cm into the target. Calculate the retardation caused by the target.


If a body is moving with a constant velocity its acceleration is ______.


A ball is rolling from A to D on a flat and smooth surface. Its speed is 2 cm/s. On reaching B, it was pushed continuously up to C. On reaching D from C, its speed had become 4 cm/s. It took 2 seconds for it to go from B to C. What is the acceleration of the ball as it goes from B to C?


Give an example of an accelerated body, moving with a uniform speed.


The change in velocity of a motorbike is 54 kmh−1 in one minute. Calculate its acceleration in (a) ms−2 (b) kmh−2.


A racing car is moving with a velocity of 50 m/s. On
applying brakes, it is uniformly retarded and comes to rest in 20 seconds. Calculate its acceleration.


Define acceleration.


A body falls towards the earth. Does it have positive or negative acceleration?


Out of energy and acceleration, which one is a vector?


State if the following situation is possible:
A body moving horizontally with an acceleration in vertical direction.


A car accelerates uniformly from a velocity of 18 km/h to 36 km/h in 15 min. What is its acceleration?


Convert the following acceleration:
 1/36 m/s2 into km/h2


From the given v-t graph it can be inferred that an object is


Assertion: The accelerated motion of an object may be due to change in magnitude of velocity or direction or both of them.

Reason: Acceleration can be produced only by change in magnitude of the velocity. It does not depend the direction.


Acceleration is defined as the rate of change of ______.


If a body starts from rest, what can be said about the acceleration of the body?


A car is being driven at a speed of 20ms-1 when brakes are applied to bring it to rest in 5 s. The deceleration produced in this case will be ______.


Assertion: Position-time graph of a stationary object is a straight line parallel to the time axis. 
Reason: For a stationary object, the position does not change with time.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×