Question

19
2.
Fill in the blanks.
(a) of the distance-time graph is a curved line, then the speed of the body is
(b) The speed of a moving body can be represented graphically by a
(c) The slope of the distance-time graph represents its
(d)
one oscillation
7.
(e) The time taken by a pendulum to complete one oscillation is called
discovered that a swinging pendulum takes a fixed time to complete​

Answer 1

Answer:

(a) If the distance time graph is a curved line then the speed of a body is changing i.e. it is not constant. It is also known as non -uniform motion.

(b) The slope (or slant) of a distance-time graph indicates the speed of the object.

(c) If an object moves along a straight line, the distance travelled can be represented by a distance-time graph. In a distance-time graph, the gradient of the line is equal to the speed of the object. The greater the gradient (and the steeper the line) the faster the object is moving.

(d) To and fro or back and forth motion of a body repeatedly over its mean position is called one oscillation.

(e) The pendulum also completes one oscillation when its bob moves from one extreme position A to the other extreme position B and comes back to A. The time taken by the pendulum to complete one oscillation is called its time period. Set up a simple pendulum as shown in Fig.

Explanation:

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