Questions · Page 2 of 2

[3 Mark Question Answer]

Question 513 Marks
Is it possible to have an accelerated motion with a constant speed? Explain.
Answer

Yes, it is possible to have accelerated motion with constant speed, when a body is moving in a circular path. The body changes its path so there is a change in direction (velocity) but its speed remains the same.
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Question 523 Marks
Define an Inclined plane.
Answer

An inclined plane is usually a smooth, flat rigid surface inclined at an angle (θ) to the horizontal. It is used to raise heavy loads with a relatively small force. The longer the slope, the smaller is the effort needed.
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Question 533 Marks
What is the form of that graph between
(i) $K.E.$ and velocity for a constant mass?
(ii) $K.E.$ and mass for a constant velocity?
Answer
(i) We have, for a constant mass,
$K.E. ∝ v^2$​​​​​​​
Hence, the graph is a parabola.

(ii) We have, for a constant velocity
$K.E. ∝ m$
Hence, the graph is a straight line.
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Question 543 Marks
What is a couple?
Answer

Two equal parallel and opposite forces acting on a rigid body at different points constitute a couple. The distance 'd' is called the arm of the couple.
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[3 Mark Question Answer] - Page 2 - Physics STD 10 Questions - Vidyadip