Answer:
5.5 rad/s
Explanation:
The friction between the coin and the turntable provides the centripetal force that keeps the coin in circular motion. Therefore, we can write:
where
is the coefficient of friction
m is the mass of the coin
is the acceleration of gravity
is the angular speed
r is the distance of the coin from the centre of rotation
In this problem,
r = 11.0 cm = 0.11 m
The coin starts to slip when the centripetal force becomes larger than the maximum frictional force:
Solving for , we find the angular speed at which this happens:
A. Insulator paper is a good insulator of heat
Answer:
Question 1: D
Question 2:D
Explanation:
Question 1: D
Question 2
mass=m=65kg
Acceleration due to gravity=g=9.8m/s^2
Height=h=7 meters
Potential energy=m x g x h
Potential energy=65 x 9.8 x 7
Potential energy=4459 joules
Gravity is an example of friction. If we didn't have gravity, we would be flying all over the place. Also, friction keeps us from sliding on the ground and falling.
Answer:
Vitamin A
Explanation:
I'm guessing though so double check.
It could also be an iron deficiency.