The Toro Co. makes Toro snowblowers, Toro lawn mowers, Toro yard tools, and Toro sprinkler systems. The Toro Co. uses a ________
1 answer:
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Answer:
a)
b)
Explanation:
The knowable variables are the initial hight and initial velocity
The equation that describes the motion of the ball is:
If we want to know the time that takes the ball to hit the ground, we need to calculate it by doing s=0 that is the final hight.
a) Solving for t, we are going to have two answers
a=-16
b=64
c=80
or
<em><u>Since time can not be negative the answer is t=6.378s </u></em>
b) To find the time that takes the ball to pass the top of the building on its way down, we must find how much does it move too
First of all, we need to find the maximum hight and how much time does it take to reach it:
at maximum point the velocity is 0
Solving for t
Now, we must know how much distance does it take to reach maximum point
So, the ball pass the top of the building on its way down at 160 ft
Solving for t
or
Since the time that the ball reaches maximum point is almost t=2s that answer can not be possible, so the answer is t=3.333s for the ball to go up and down, passing the top of the building
Answer:
The magnitude of the acceleration ae of the earth due to the gravitational pull of the moon is
Explanation:
By Newton's gravitational law, the magnitude of the gravitational force between two objects is:
(1)
With G the gravitational constant, M the mass of earth, m the mass of the moon and r the distance between the moon and the earth, a quick search on physics books or internet websites give us the values:
Using those values on (1)
Now, by Newton's second Law we can find the acceleration of earth ae due moon's pull: