Answer:
18.4 m
Explanation:
(a)
The known variables in this problem are:
u = 1.40 m/s is the initial vertical velocity (we take downward direction as positive direction)
t = 1.8 s is the duration of the fall
a = g = 9.8 m/s^2 is the acceleration due to gravity
(b)
The vertical distance covered by the life preserver is given by
If we substitute all the values listed in part (a), we find
Answer:
The length is d = 5
Explanation:
We must identify the respective coordinates of both points.
(x1,y1) = (2,3)
(x2,y2) = (5,7)
Now we know the distance equation of a straight line:
To calculate the thickness of foil, we use formula of volume as
Here, l is the length of the foil, w is the width of the foil and t is the thickness of the foil.
Given, ,
and
.
Substituting theses values in above equation, we get
Thus, the thickness of the foil is 0.0015 cm.