A child is sitting on a swing. Its minimum and maximum heights from the ground are 0.75 m and 2 m respectively, its maximum speed will be

Question

A child is sitting on a swing. Its minimum and maximum heights from the ground are 0.75 m and 2 m respectively, its maximum speed will be (A) 5 m/s (B) 8 m/s (C) 10 m/s (D) 15 m/s

Tardigrade Admin · Accepted Answer

Maximum speed v =√2 g(h2-h1) =√2 × 10 ×(2-0.75) =√(20 × 1.25) =√25=5 m / s

Q. A child is sitting on a swing. Its minimum and maximum heights from the ground are $0.75 m$ and $2 m$ respectively, its maximum speed will be

5 m/s

8 m/s

10 m/s

15 m/s

Maximum speed $v = 2 g (h_{2} - h_{1})$
$= 2 \times 10 \times (2 - 0.75)$
$= (20 \times 1.25)$
$= 25 = 5 m / s$

Q. A child is sitting on a swing. Its minimum and maximum heights from the ground are 0.75m and 2m respectively, its maximum speed will be