ANSWER and EXPLANATION
We want to classify the forces given as either external forces or internal forces.
An internal force is a force that does not change the mechanical energy of an object. In other words, these forces act between two different parts of an object.
An external force is a force that is due to an external agent acting outside of a body or system.
Therefore, going by these definitions, we see that the forces that are internal forces are:
- Shear
- Gravity
- Torsion
and the force that is an external force is:
- The force of the floor on your feet when you are standing.
Answer:
Cold Front 3 // Stationary Front 1 // Warm Front 2 // Occluded Front 4
Explanation:
It's simple. Warm front means the warm air is pressing forward, which is why it's a warm front. Stationary Front, meaning they're at a standstill, also makes sense because stationary means not moving. Then since your last option is Occluded Front, since the others already have an answer, you have no choice but to match 4 with it. I took the quiz and got the answer right. :D
Answer:
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I believe it is true.
Weight is the way we usually describe what the scales tell us, but our weight is actually something different.
"When you get on the scale and it tells you that you weigh 50 kilograms, that isn't your weight. That's actually your mass", says Dr Nicole Bell from the University of Melbourne.
"In everyday speech weight and mass are used interchangeably, but weight is a figure arrived at by multiplying mass by gravitational acceleration".
Physicists use Newton's 2nd law (F = ma) to describe the forces acting upon an object moving through space, where force is equal to mass times acceleration.
"In the case of weight, we can describe the force as W = mg", says Bell. "That is weight is equal to mass times gravitational acceleration.
Weight is not measured in kilograms, but in Newtons.
Explanation:
Answer:
The amount of work is 89600 ft-lb.
Explanation:
Given that,
Length of the cable = 160 ft
Weight density = 7 lb/ft
Weight of cable to be filled = 7(160-x)
We need to calculate the amount of work
Using formula of work done
On integration
Hence, The amount of work is 89600 ft-lb.
Explanation:
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