First slide

Rectilinear Motion

Question

A ball is thrown upwards from the top of a tower of height 40 m with a velocity of 10 ms^-1. Find the time when it strikes the ground.

Moderate

A

3 s
B

4 s
C

5 s
D

6 s

Solution

$S = u t + \frac{1}{2} a t^{2} - 40 = 10 t + \frac{1}{2} (- 10) t^{2} t^{2} - 2 t - 8 = 0 o n s o l v i n g w e g e t t = 4 s a n d t = - 2 s$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App