Answer:
(a)
(b)
(c)
Explanation:
First change the units of the velocity, using these equivalents and
The angular acceleration the time rate of change of the angular speed according to:
Where is the original velocity, in the case the velocity before starting the deceleration, and is the final velocity, equal to zero because it has stopped.
b) To find the distance traveled in radians use the formula:
To change this result to inches, solve the angular displacement for the distance traveled ( is the radius).
c) The displacement is the difference between the original position and the final. But in every complete rotation of the rim, the point returns to its original position. so is needed to know how many rotations did the point in the 890.16 rad of distant traveled:
The real difference is in the 0.6667 (or 2/3) of the rotation. To find the distance between these positions imagine a triangle formed with the center of the blade (point C), the initial position (point A) and the final position (point B). The angle is between the two sides known. Using the theorem of the cosine we can find the missing side of the the triangle(which is also the net displacement):
Answer:
Explanation:
The weight of the bee is:
with m the mass and g the gravity acceleration.
Electric force of the bee is related with the electric field of earth by:
with q the charge, E the electric field and Fe the electric force.
So:
Because Newton's first law we should make the net force on it equals cero:
with W the weight, Fe the electric force on the bee due earth's electric field and F the force.
So, the applied electric field should be:
The negative sign indicates that the electric field should be opposite to earth's electric field, so it should be upward.
You change the independent variable.
A neutral object contains no net charge, but still has many charged particles within the object, it just means that the charges cancel each other out.