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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ७

The rate of change of velocity is ______.

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प्रश्न

The rate of change of velocity is ______.

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उत्तर

The rate of change of velocity is acceleration.

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अध्याय 2: Force and Motion - Evaluation [पृष्ठ २५]

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सामाचीर कलवी Science - Term 1 [English] Class 7 TN Board
अध्याय 2 Force and Motion
Evaluation | Q II. 2. | पृष्ठ २५

संबंधित प्रश्न

Give a scientific reason.

When an object falls freely to the ground, its acceleration is uniform.


Distinguish between acceleration and retardation.


A body is moving vertically upwards. Its velocity changes at a constant rate from 50 m s−1 to 20 m s1 in 3 s. What is its acceleration?


The velocity-time graph for a uniformly retarded body is a straight line inclined to the time axis with an obtuse angle. How is retardation calculated from the velocity-time graph?


A train moving with a velocity of 20 ms−1 is brought to rest by applying brakes in 5 s. Calculate the retardation.


A car travels with uniform velocity of 25 m s-1 for 5 s. The brakes are then applied and the car is uniformly retarded and comes to rest in further 10 s. Find:

  1. The distance which the car travels before the brakes are applied,
  2. Retardation and
  3. The distance travelled by car after applying the brakes.

When is the acceleration due to gravity positive?


From the velocity – time graph given below, calculate deceleration in region BC.


A motor bike running at 5 ms−1, picks up a velocity of 30 ms−1 in 5s. Calculate

  1. acceleration
  2. distance covered during acceleration.

What does a positive acceleration mean?


Can you use the relation [B1]?


A car is moving with a speed of 50 km/h. One second later, its speed is 55 km/h. What is its acceleration?


A car accelerates to a velocity of 30 m/s in 10 s and then decelerates for 20 s so that it stops. Draw a velocity-time graph to represent the motion and find:
The Deceleration.


Correct your friend who says that acceleration gives the idea of how fast the position changes.


What do you mean by constant acceleration?


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


A bus can accelerate with an acceleration of 1 m/s2 . Find the minimum time for the bus to attain the speed of 100 km/s from 50 km /s.


The speed of a particle is constant. Will it have acceleration? Justify with an example.


The acceleration of the body that moves with a uniform velocity will be ______.


A bus accelerating with 4ms-2 changes its speed from 60ms_1 to a certain value in 5s. The final speed is ______.


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