Answer:
Part a)

Part b)


Part c)
equation of position in x direction is given as

equation of position in y direction is given as

Part d)

Part e)
H = 88.5 m
Part f)
t = 1.2 s
Explanation:
As we know that ball is projected with speed
v = 8.10 m/s at an angle 18 degree below the horizontal
so we will have




Part a)
Since it took t =4 s to reach the ground
so its initial y coordinate is given as



Part b)
components of the velocity is given as




Part c)
equation of position in x direction is given as

equation of position in y direction is given as

Part d)
distance where it will strike the floor is given as



Part e)
Height from which it is thrown is same as initial y coordinate of the ball
so it is given as
H = 88.5 m
Part f)
time taken by ball to reach 10 m below is given as


t = 1.2 s
Speed of a wave = (wavelength) x (frequency)
Speed of this wave = (100 m) x (5 / sec)
<em>Speed = 500 m/s</em> (about 1,118 miles per hour)
Given: Please see the attached image below.
To be able to
subtract vectors, we can either use the parallelogram method or the triangle
method. Take note that the only difference is that alternatively adding vectors
A and B, we will instead be adding A and – B. When we ponder of vector subtraction, we must
anticipate about it in terms of adding a negative vector. A negative vector has the same magnitude as the
original vector, however, it has an opposite direction.
So in this problem, the two vectors that will have the
largest magnitude are A & F when subtracted (i.e., when one vector is
subtracted from the other).