Answer:
T = 98.1 N
Explanation:
Given:
- mass of bar m = 10 kg
- Length of the bar L = 2 m
- Angle between Cable and wall Q = 30 degres
Find:
- Find the tension in the cable.
Solution:
- Take moments about intersection of bar and wall, to be zero (static equilibrium)
(M)_a = 0
T*sin( 30 )*L - m*g*L/2 = 0
T*sin(30) - m*g / 2 = 0
T = m*g / 2*sin(30)
T = 10*9.81 / 2*sin(30)
T = 98.1 N
Answer:
Explanation:
If there is only 1 force, the body can never be in equilibrium, providing that the force is not zero (and that would hardly be a force. Zero is possible in math and it means something. It is debatable in physics).
You cannot think of a condition where something is stationary on planet earth and there are not 2 forces or more forces involved.
Think of something like a block of wood sitting on a table. It is not moving, we'll say. Gravity is holding it down, but what is pushing up on it?
The table is. There are 2 forces and they are equal in magnitude, but opposite in direction. That matters.
I think the answer is A) Cindy biked westward at 30km/h. I'm sorry if I'm wrong. If that's not correct then it's definitely C) A dog runs an average of 8mp/h. I hope this helps. :)
Two factors determine whether a substance is a solid, a liquid, or a gas: The kinetic energies of the particles (atoms, molecules, or ions) that make up a substance. Kinetic energy tends to keep the particles moving apart. The attractive intermolecular forces between particles that tend to draw the particles together.
