Step 1: Look in your book or online for the conical pendulum equation.
Step 2: Look at the drawing and see which angle is involved in the equation.
Answer: It's Angle #2 in your drawing.
Answer:
Distance = 2m
Explanation:
Given the following data;
Workdone = 270J
Force = 135N
To find the height (distance);
Workdone = force * distance
Substituting into the equation, we have
270 = 135 * distance
Distance = 270/135
Distance = 2m
Answer:
4.2 kg
Explanation:
I' = moment of inertia of potter's wheel = 24 kgm²
w₀ = initial angular speed of the system = 40.0 rpm
w = final angular speed of the system = 32 rpm
m = mass of the clay = ?
r = distance of clay from axis of rotation = 1.20 m
I₀ = Initial moment of inertia of the system = I' = 24 kgm²
I = final moment of inertia = I₀ + m r² = 24 + m (1.20)²
Using conservation of angular momentum
I₀ w₀ = I w
(24) (40) = (24 + m (1.20)²) (32)
m = 4.2 kg
PART A) Yes, the fact that there is a frictional force acting on the satellite generates a loss of energy due to friction. What causes satellite to diminish its orbit during its tour. In fact, many satellites have rectifier systems that allow them to position themselves and remain in their orbit for a long time to avoid being trapped by the Earth's gravity Force and fall into the atmosphere where they would probably be torn apart.
PART B) As a similarity, one could start by mentioning the structure of the two equations are similar and have their own constants who were responsible for supporting them. While the law of gravity speaks of the masses of the bodies the electrostatic law speaks of the charges of the bodies. For both the force is inversely proportional to the square of the distance that separates them.
However, the most notable difference between them is basically their statement. While one of the equations speaks about greavedad the other reflects the electromagnetic phenomena. It should be noted that the force of gravity is much weaker than the electromagnetic force and that the latter has the capacity of attraction and repulsion. While the gravitational force only that of attraction.