Name three bright Saturn ring features, and explain why they are so bright.
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The force exerted by the rope is 132 N.
<u>Explanation:</u>
It is known that the external force applied on any object is directly proportionate to the products of mass of the object and the acceleration attained by the object. So, here, the object is a barrel of mass 12 kg. It is given that barrel is pulled by a rope. So tension force will be acting on the rope during pulling the barrel.
As the barrel is being pulled up with an acceleration of , the force required to attain this acceleration is the net force on the barrel. But there is gravitational force which will also be acting on the barrel in opposing direction to the tension force of the rope.
Thus the net force experienced by the barrel is difference between the tensional force exerted by the rope on the barrel in upward direction and the gravitational force on the barrel in downward direction.
As,
Similarly,
Thus, force exerted by the rope=14.4 N + 117.6 N = 132 N
As per Newton's law of cooling we know that
in 5 hours the body temperature becomes 79.6 from 84.4
while the surrounding temperature is given as 68 degree F
now from above formula
now let say the person died "t" time ago
now we will have
so he died at approx 5 Am in morning