Acceleration
due to gravity = 2.6m/s²
Length
of building = d = 88.3m
<span>Time
he needed before she hits the ground = ?
we can find the time by using the
formula;</span>
D =
1/2at²
Now
putting the value;
<span>88.3
= (1/2) a t</span>²<span>
88.3 = 1/2 x 23.6 x t</span>²
t² =
88.3 / 11.8
=
7.48
<span>t = 2.735 seconds
</span>
Answer:
d) Wind
Explanation:
Secondary energy is energy produced by converting energy available in its natural state in the environment. Hence Wind is a primary source not a secondary source
Answer:
Part i)
h = 5.44 m
Part ii)
h = 3.16 m
Explanation:
Part i)
Since the ball is rolling so its total kinetic energy in this case will convert into gravitational potential energy
So we have
here we know that for spherical shell and pure rolling conditions
Part b)
If ball is not rolling and just sliding over the hill then in that case
