You have learned your lesson well, Suhay. Your statement is correct.
The light rays from the fish BEND when they flow out of the water into the air. But our primitive brain still believes that the light rays flow STRAIGHT from the fish. The result is that the fish does not APPEAR to be at that place where it really is.
<span>The magnitude of the rock is equal to g. After the rock is released, there are no more forces acting on it, yet gravity remains. The initial inputs, on a bridge, at an angle of 30 deg below horizontal do not matter after the release.</span>
Answer:
12.7 N
15.7 N
Explanation:
mass (m) = 0.15 kg
radius (r) = 0.6 m
speed = 2 rps = 2 x 60 = 120 rpm
acceleration due to gravity (g) = 9.8 m/s^{2}
find the tension at the top and bottom of the circle.
Tension at the top T = 
v = radius x rpm x 0.10472 = 0.6 x 120 x 0.10472 = 7.54 m/s
- we can now substitute the value of v into T =
T = 
= 12.7 N
Tension at the bottom T' = 
v = radius x rpm x 0.10472 = 0.6 x 120 x 0.10472 = 7.54 m/s
- we can now substitute the value of v into T' =
T' = 
= 15.7 N
This force is called the reaction force or also known as the normal force. This is a concept from Newton's Third Law of Motion, which states that for every action, there is an equal and opposite force. This force is what keeps the notebook on place on top of the table. It is the force exerted by the table to the book.
