Question

physics class 9 assertion reason​

Answer 1

Answer:

Answer: (a) Both assertion and reason are true and reason is the correct explanation of assertion.

This is the equation of a parabola. A parabola results when one quantity is proportional to the square of the other. When an object is moving with a constant velocity (zero acceleration), the displacement versus time graph is a straight line and its slope is velocity. When an object is moving at a constant speed but its direction of motion changes, its velocity changes and thus acceleration is produced. Motion of an object in a circular path is such an example. In a uniform circular motion, the direction of motion of the object changes continuously and hence the velocity changes continuously even though the speed is constant.

Answer 2

Answer:

Explanation:

350 Kg of Wheat is consumed in 49*30 person-days 1 Kg of Wheat is consumed in (49*30)/350 = 21/5 person-days 50 Kg of Wheat is consumed in (21/5)*50 = 210 ...

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