First slide

Position Path Length (Distance) And Displacement

Question

A particle is constrained to move on a straight line path. It returns to the starting point after 10 sec. The total distance covered by the particle during this time is 30 m. Which of the following statements about the motion of the particle is false

Easy

A

Displacement of the particle is zero
B

Average speed of the particle is 3 m/s
C

Displacement of the particle is 30 m
D

Both (1) and (2)

Solution

Displacement of the particle will be zero because it comes back to its starting point $Average speed = \frac{Total distance}{Total time} = \frac{30 m}{10 \sec} = 3 m / s$

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