the answer would be D
hope this helps!
Explanation:
h=((usinx)^2)/2g
12.7=((usin(19))^2)/(2×9.8)
(12.7×2×9.8)=(usin(19))^2
248.92=(usin(19))^2
usin19 =√248.92 =15.78
U =15.78/(sin19)
=48.46m/s----> speed
Answer:
Forces observed by both is same as both
The frames are non-acceleration
Zweistein = Einstein
=
as tend to zero (0)
< as some quantity is subtracted from the force.
By mouth...
using hands.. :))