Answer:
0.399 rev/s
Explanation:
Given that,
The diameter of a tornado, d = 74 m
Radius, r = 37 m
Linear velocity, v = 335 km/h = 93.05 m/s
We need to find the angular velocity in revolutions per second. Let it is
. The relation between angular velocity and linear velocity is as follows :

or

So, the angular velocity of the blade is 0.399 rev/s.
Answer:
the force of friction = fk = (uk)n = 402(uk)
the net force acting to accelerate bookcase = ma = (41)(0.12) = 4.9 N
the {assumed horizontal} push force = 65 N
so
65 - fk = 4.9
fk = 65 - 4.9 = 60 N
uk = 60/402 = 0.15 <= ANS
Answer:
The vector has a magnitude of 33.86 units and a direction of 121.64°.
Explanation:
To find the magnitude, you use the Pitagorean theorem:

In order to find the direction, you can use trigonometry. You have to keep in mind, that as the y component of the vector is positive and the x component is negative, the vector must have an angle between 90 and 180°, or in the second quadrant of the plane.:
° or, 58.36° in the second quadrant
Answer:
Force is a push or pull action between objects. Pressure is force acting on a surface area of an object, thus it is force per unit area.
Explanation: