Q.
A ball is dropped from a height of 49 m, the wind blows horizontally and imparts a constant acceleration of 4.90 ms-2 to the ball. Choose the correct statement(s).
see full answer
Start JEE / NEET / Foundation preparation at rupees 99/day !!
21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya
a
Path of the ball is a straight line.
b
Path of the ball is a curved one.
c
The time taken by the ball to reach the ground is 3.16 s.
d
The angle made by the line joining initial and final positions (on ground after 1st strike) of the ball with horizontal is greater than 45o.
answer is A.
(Unlock A.I Detailed Solution for FREE)
Ready to Test Your Skills?
Check your Performance Today with our Free Mock Test used by Toppers!
Take Free Test
Detailed Solution
ux=uy=0,ax=4.9ms−2,ay=9.8ms−2So x=12axt2and y=12ayt2 xy=axay=12So path of the ball is a straight line. Let t be the time taken by the ball to reach ground, then 49=12ayt2⇒t2=10⇒t=3.16stanθ=ayax=2⇒θ=tan−1(2)
Watch 3-min video & get full concept clarity