Answer:
Explanation:
Given that,
Applied force, F = 200 N
Weight of the object, or the normal force, N = 400 N
We need to find the coefficient of static friction between the object and the surface.
The force of friction has the same magnitude as that of applied force. It can be given by :
mg is weight of the object
So, the coefficient of static friction between the object and the surface is 0.5.
Answer:
Below given
Explanation:
constant velocity of 5 m/s. Calculate:
(a) the kinetic energy of the boy
(b) the work done by the boy
[Ans.(a) 6.25 ), (b) 6.25]] can some on show me how the answer
came
Answer:
Explained
Explanation:
Big Bang happened about 13.7 billion years ago. It is most accepted theory of universe creation. Several experiments have confirmed the happening of big bang back then, in promising way. One of this experiment is the red shift experiment. A scientist named Edwin Hubble tried to study the spectrum of stars. He made a shocking revelation that universe is rushing outwards in all directions. Light travelling away registers on the red side. He observed that the distance stars showed red shift in accelerated manner. If the universe is accelerating that means, at one point it would have been smaller, in fact it was as small as an atom, some how it exploded and lead to formation of the expanding universe.
