Question

66) If a, 5 m/s2 & 0-45° then la is found to be:​

Answer 1

Answer:

Correct option is

D

40:1

Horizontal velocity, vx=20cos(45o)=102m/s

Vertical Velocity , vy=20sin(45o)=102m/s 

Using s=ut+21at2   h=102t−21×10×t2   ....1

⇒x=102t   ⇒t=102x

Put the value of t in equation 1, we get 

h=x−401x2, 

By comparing the given equation of trajectory, ⇒A=1 and B=401

Hence, A:B=1:401=40:1