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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ७

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

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प्रश्न

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

विकल्प

  • in uniform motion

  • at rest

  • in non - uniform motion

  • moving with uniform accelerations

MCQ

उत्तर

moving with uniform accelerations

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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 I. 4. | पृष्ठ २५

संबंधित प्रश्न

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?


The unit of retardation is ____________


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 ?


An aeroplane lands at 216 kmh−1 and stops after covering a runway of 2 m. Calculate the acceleration and the time, in which it comes to rest.


A truck running at 90 kmh−1, is brought to rest over a distance of 25 m. Calculate the retardation and time for which brakes are applied.


Define acceleration.


The acceleration of a body is 8.5 ms-2. What does this statement mean?


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.


Interpret the following graph:


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 acceleration.


Figure represents graphically the velocity of a car moving along a straight road over a period of 100 hours.

Calculate the acceleration along AB and the retardation along BC.


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


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.


Exercise Problem.

A racing car has a uniform acceleration of 4 ms–2. What distance it covers in 10 s after the start?


The slope of a velocity-time graph gives ______.


If the velocity of a body does not change, then its acceleration is ______.


m/s2 is the unit of ______.


Assertion: A negative acceleration of a body can be associated with speeding up of the body.
Reason: Increase in the speed of a moving body is independent of its direction of motion.


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