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Class 9
Science
Force and Laws of Motion
the following is the distance time table of an obj...

Question:
The following is the distance-time table of an object in motion:
Time in seconds Distance in metres
0 0
1 1
2 8
3 27
4 64
5 125
6 216
7 343
(a) What conclusion can you draw about the acceleration? Is it constant, increasing, decreasing, or zero?
(b) What do you infer about the forces acting on the object?

Answer:

(a) From the above table, an unequal change of distance in an equal interval of time.

Thus, the acceleration is non − uniform. Since the velocity of the object increases with time, the acceleration is increasing non-uniformly.

(b) According to Newton’s second law of motion,

Force = mass x acceleration

The force acting on an object is directly proportional to the acceleration produced in the object.

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