Answer:
Explanation:
Strain is defined as the ratio of an object's dimensional change when subjected to a force:
where
indicates the alteration in length of the object
signifies the object's initial length
In this case, we have and
, hence the strain is
Answer:
1)
2)
Explanation:
Projectile Motion
When an object is projected near the surface of the Earth at an angle to the horizontal, it follows a trajectory known as a parabola. The only force acting on it (ignoring wind resistance) is gravity, affecting the vertical axis.
The height of a projectile can be calculated using
where represents the initial height from ground level,
is the vertical component of the initial velocity, and t is the elapsed time.
The vertical speed component is expressed as
1) To proceed, we will determine the initial vertical velocity component since we lack sufficient data to calculate the absolute value of .
The peak height is attained when , which allows us to compute the time to reach that height.
Solving for
Thus, the maximum height reached is
We know this value is equal to 8 meters
Continuing with the calculations for
Substituting known values yields
2) At t=1.505 seconds, the ball is positioned above Julie’s head; we can calculate