A window washer who does not want to change his position will want the forces acting on him to be ____________.
1 answer:
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Answer: a) P.E = - 0.76J
b) W = 2.7 rad/s
c) V = 2.7m/a
d) V = 4.43 m/s
Explanation: Please find the attached files for the solution
Answer
given,
weight of airplane,W = 10,100 lb
Wing area,A = 233 ft²
now,
Wing Loading Calculation in English engineering
=
=
= 43.35 lb/ft²
Wing Loading in SI unit
=
=
Wing loading in kgf/m²
=
= 211.57 kgf/m²
Answer:
The object will have an upward acceleration
Explanation:
Let's consider the forces applied on the box. We have only two forces:
- The applied force of push, , downward
- The force of gravity, , (also known as weight of the object), downward
Therefore, the net force on the box is:
Here, we know that force applied is equal or greater than the weight, so
And therefore the net force is greater than zero:
(1)
According to Newton's second law of motion, the net force on the box is equal to the product between its mass and its acceleration:
where
m is the mass of the box
a is its acceleration
Given (1), this means that
Therefore, the box will have an upward acceleration.
In this case force example we have:
So the mass of the box is
So the net force is
And the acceleration is