NEETPhysicsMotion in A PlaneMCQ+4 / −1
A horizontal bridge is built across a river. A student standing on the bridge throws a small ball vertically upwards with a velocity . The ball strikes the water surface after . The height of bridge above water surface is (Take )
- A60 m
- B64 m
- C68 m
- D56 m
View written solutionFree
Correct answer: B
$$S=u t+\frac{1}{2} a t^{2}$$

$$-\mathrm{H}=4 \times 4-\frac{1}{2} \times 10 \times 4^{2}$$
$-\mathrm{H}=16-80$
$-\mathrm{H}=-64$
$$\mathrm{H}=64 \mathrm{~m}$$
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