A piece of rope is pulled by two people in a tug-of-war. each exerts a 400-n force. what is the tension in the rope?
2 answers:
Answer:
400 N
Explanation:
According to Newton's third law of motion: For every action, there is an equal and opposite reaction. The tension in the rope occurs due to the amount of the force by which the rope is pulled.
There is zero acceleration in the rope as it is being pulled from opposite ends with equal force.
consider one half of the rope:
Thus, tension in the rope = 400 N
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Answer:
(a)2.865 s
(b)2.865 s
Explanation:
We are given that
Acceleration,a=
a.Initial speed,u=29 m/s
Final speed,v=39 m/s
We know that
Using the formula
b.Initial speed,u=59 m/s
Final speed,v=69 m/s
Again using the formula
<h2>Answer: Albedo
</h2>
The <u>albedo</u> is an amount that expresses the percentage of radiation a surface reflects with respect to the incident radiation.
In other words:
This amount allows us to know the level of radiation that <u>reflects</u> a surface compared to the total <u>radiation it receives</u>.
According to this, light surfaces such as snow covered ground or white sand will have a higher albedo than dark surfaces such as carbon covered ground. It is also important to note, the albedo will be higher on glossy surfaces than on matte surfaces.
It should be noted that the albedo of the Earth is on average about , which means that part of the radiation received by the Sun is absorbed and another part reflected back to space.