Answer: Height of building = 17.69m, velocity of brick = 18.6m/s
Explanation: From the question, the body has a zero initial speed, thus initial velocity (u) all through the motion is zero.
By ignoring air resistance makes it a free fall motion thus making it to accelerate constantly with a value of
.
Time taken to fall = 1.90s
a)
thus the height of the building is calculated using the formulae below

but u = 0 , hence


b)
to get the value of velocity (v) as the brick hits the ground, we use the formulae below

but u= 0, hence


find the attachment in this answer for the accleration- time graph, velocity- time graph and distance time graph
harmless, a sheet of paper
Alpha particles do not possess a high amount of energy and are not very ionizing, since they have a high mass. This makes them relatively safer to work with.
The moon lacks an atmosphere compared to the Earth. Hope this helps!
F = ma
F 1500N
m = 100 kg
1500 = 100 * a
Solve for a.