Question

A object starting from A takes 30 seconds to complete one circular round with radius 10 m find the distance and displacement after 1 min 15 S​

Answer 1

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In one complete cycle, it comes back to its initial position, so the displacement of the object is zero. Distance travelled = circumference of the circle = 20

=2x22

x 3.5

=22m

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Answer 2

Step-by-step explanation:

Radius = 10m

Time taken for one round = 30 seconds

1 minute = 60 s

so we can complete 2 rounds in 1 minute, as 1 round is 30 seconds.

in 15 seconds, we can complete half round, as 1 round is 30 seconds, and 15 is half of 30.

therefore we have covered a total of 2 and a half rounds in 1 min 15 s

Distance travelled

circumference of the circle = 2πr

2 × 3.14 × 10

= 62.8 m is the distance travelled in 1 min 15 s

displacement

after covering 2 and a half rounds, we would reach the opposite point of the starting point on the circle.

hence we will use diameter

diameter = 2 × radius

diameter = 20 m

= displacement is 20m

Final Answer

Distance = 62.8 m

Displacement = 20 m

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