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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ७

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

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प्रश्न

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

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उत्तर

There are two possible answers:

Velocity gives an idea of how fast the position changes, or Acceleration gives an idea of how fast the velocity changes.

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अध्याय 2: Force and Motion - Evaluation [पृष्ठ २६]

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सामाचीर कलवी Science - Term 1 [English] Class 7 TN Board
अध्याय 2 Force and Motion
Evaluation | Q V. 3. | पृष्ठ २६

संबंधित प्रश्न

Give a scientific reason.

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


An object of mass 16 kg is moving with an acceleration of 3 m/s2. Calculate the applied force. If the same force is applied to an object of mass 24 kg, how much will be the acceleration?


Define acceleration. State its unit.


Give one example of the following motion:

Uniform retardation


State the type of motion represented by the following sketches in Figures.

Give an example of each type of motion.


Draw a graph for acceleration against time for a uniformly accelerated motion. How can it be used to find the change in speed in a certain interval of time?


A body falls freely from a certain height. Show graphically the relation between the distance fallen and square of time. How will you determine g from this graph?


A train starts from rest and accelerates uniformly at a rate of 2 m s−2 for 10 s. It then maintains a constant speed for 200 s. The brakes are then applied and the train is uniformly retarded and comes to rest in 50 s. Find

  1. The maximum velocity reached,
  2. The retardation in the last 50 s,
  3. The total distance travelled,
  4. The average velocity of the train.

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


The acceleration of a moving body is constant in magnitude and direction. Must the path of the body be a straight line?
If not, given an example.


What does a negative acceleration mean?

Write the SI unit of acceleration and retardation.


The speed of a car increases from 10 km/h to 64 km/h in 10 seconds. What will be its acceleration?


State if the following situation is possible:
A body moving with a constant velocity in an accelerated motion.


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:
Distance travelled


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


The Unit of acceleration is ______.


When a body starts from rest, the acceleration of the body after 2 seconds in ______ of its displacement.


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


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