A stone is dropped from the window of a bus moving at 80 km/h. If the window is 150 cm high, find the distance along the track which the stone moves before striking the ground.

Question

A stone is dropped from the window of a bus moving at 80 km/h. If the window is 150 cm high, find the distance along the track which the stone moves before striking the ground. (A) 15.26 m (B) 13 m (C) 14.16 m (D) 12 m

Tardigrade Admin · Accepted Answer

As we know the relation, u =80 × (5/18)=22.22 m / s R = u √(2 h / g ) h=150 × 10-2=1.5 m R =22.22 × √(2 × 1.5/10) =22.22 √(3/10) =22.22 × 0.54 =11.99 ≈ 12

Q. A stone is dropped from the window of a bus moving at $80 km / h$ . If the window is $150$ cm high, find the distance along the track which the stone moves before striking the ground.

$15.26$ m

$13$ m

$14.16$ m

$12$ m

As we know the relation,
$u = 80 \times \frac{5}{18} = 22.22 m / s$
$R = u \frac{2 h}{g}$
$h = 150 \times 1 0^{- 2} = 1.5 m$
$R = 22.22 \times \frac{2 \times 1.5}{10}$
$= 22.22 \frac{3}{10}$
$= 22.22 \times 0.54$
$= 11.99 \approx 12$

Q. A stone is dropped from the window of a bus moving at 80km/h. If the window is 150 cm high, find the distance along the track which the stone moves before striking the ground.

15.26 m

13 m

14.16 m

12 m