Choice B, 3 E8 m/s because it will stay the same no matter where he is or how fast he's going
Answer:
The resultant vector is
.
Explanation:
First, each vector is determined in terms of absolute coordinates:
6-meter vector with direction: 30º north of east.


4-meter vector with direction: 30º east of north.


The resultant vector is obtaining by sum of components:

The resultant vector is
.
Answer:
(a) 
(b) 
(c) 
(d) 
Solution:
As per the question:
Angular velocity, 
Time taken by the wheel to stop, t = 2.4 h = 
Distance from the axis, R = 38 cm = 0.38 m
Now,
(a) To calculate the constant angular velocity, suing Kinematic eqn for rotational motion:

= final angular velocity
= initial angular velocity
= angular acceleration
Now,


Now,
(b) The no. of revolutions is given by:



(c) Tangential component does not depend on instantaneous angular velocity but depends on radius and angular acceleration:

(d) The radial acceleration is given by:

Linear acceleration is given by:


Answer:
How much does a hair weigh in MG?
An average hair (about six inches in length) weighs about 0.2-0.4 milligrams or 0.00015 ounces. A healthy person has anywhere between 80,000 and 120,000 hairs on their head.
Explanation: