First slide
Vertical projection from top of a tower
Question

A pebble is thrown vertically upwards from a bridge with an initial velocity of 4.9 m/s. It strikes the water after 2 s. The height of the bridge is:

Easy
Solution

By using s=ut+12at2 and taking upward as positive direction
We have -h=4.9 (2)+12-9.822h=9.8m

Get Instant Solutions
When in doubt download our app. Now available Google Play Store- Doubts App
Download Now
Doubts App