Question

2. A farmer moves along the
A farmer moves along the boundary of a square field of side
10 m in 40 s. What will be the
magnitude of displacement of the
farmer at the end of 2 minutes 20
seconds from his initial position?

3.Which of the following is true for
displacement?
(a) It cannot be zero.
(b). Its magnitude is greater than
the distance travelled by the
object.

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Answer 1

Answer:

2.5m 3.b

Explanation:

2.d=10m

t=40s

s=10/40=0.25m/s

now, t=140s

s=0.25m/s

d=0.25*140=35m

peremeter of square is 40m

∴displacement is 5m.

3. displacement can be zero if obect travels and returne at same position after given time and hence answer is b.(option elemination)

Answer 2

Answer :-

Neither of the statements are true. Statement (a) is false because the displacement of an object which travels a certain distance and comes back to its initial position is zero. Statement (b) is false because the displacement of an object can be equal to, but never greater than the distance traveled.