10 Questions MCQ Test Science Class 9 - MCQ: Equations of Motion
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If you whirl a stone on the end of the string and the string suddenly breaks, the stone will:
Detailed Solution for MCQ: Equations of Motion - Question 4
The correct option is A because when a stone is whirling around ,tied to a string its direction of the motion is constantly changing ,even if the speed/velocity is uniform.At the time of the string breaking,the stone because of it inertia of motion follows the direction which it had at the time of string breaking,which is mostly the tangent.
Detailed Solution for MCQ: Equations of Motion - Question 8
Consider a velocity - time graph for a uniformly accelerated body starting from rest is represented as follows.
u = velocity at time t1
v = velocity at time t2
If acceleration is represented as a, then, acceleration is defined as the rate of change in velocity.
⇒ a = v-u / t2 - t1
⇒ a = v-u /t
Or,v-u = at ⇒ v= u + at
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MCQ: Equations of Motion
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