Question

47. A boy drops a ball from the top of a building. If the ball
takes 4 s to drop to the floor, what is the height of the
building? (Take g = 10 ms-2)
(a) 20 m (b) 40 m (c) 80 m (d) 160 m
48, A robot shoot boll out
57.​

Answer 1

Answer:

AS WE KNOW THAT ALL QUESTION BASED ON GRAVITATION CAN BE SOLVED BY KINEMATICAL EQUATIONS

S= UT + 1/2AT^2

S= 0×4 + 1/2 ×10×4^2

S= 0 + 5×16

S= 80m

SO OPTION C IS THE RIGHT ANSWER

HOPE THIS MAY HELP.

HAVE A GOOD DAY.

Answer 2

Answer:80

Explanation:

S = ut + 1/2 at^2

S = 0*t + 1/2 * 10*4^2

S =0+ 80

S = 80