Homework Statement
A 5 kg object is pushed up along a plane inclined 30 degrees from the horizontal by a force of 20.25 N. If the velocity is 2.0 m/s at the foot of the plane and the coefficient of kinetic friction between the plane and the object is 0.25, how far up the plane will the object...
Homework Statement
A horizontal force of 20 N is required to move an object with a mass of 8 kg along a horizontal floor with constant velocity. Find the coefficient of kinetic friction.
Homework Equations
f = uN
u = f/N
The Attempt at a Solution
u = 20 N/(8 kg X 9.8 m/s2)
u = 20 N/78.4 N...
Homework Statement
If the force needed to start the motion of an object having a mass of 2.5 kg is 4.90 N, what is the coefficient of static friction?
Homework Equations
f = uN
Since u is missing, the formula is u = f/N
The Attempt at a Solution
u = 4.90 N/(2.5 kg X 9.8 m/s2)
u = 4.90...
I had some colleagues in College who took a degree in Math on their first two years. After finishing their second year, they shifted to a different course. They already finished from Algebra to Calculus and they were in an even higher math. They were asked to prove that
1 + 1 = 3
This is...
I don't know the answer to this question but it may only require common sense:
Let's say an apple on the surface of the Earth weighs 0.25 Kg. Imagine the apple as the little Earth and the whole Earth on top of it. What is the weight of the Earth with reference to that apple?
I suspect...
When I was in college years ago, I came across this test question:
How will the periodic table of elements look like in another planet?
Perhaps, it is asking for a general answer. Do you know if it will change the order of the elements?
Hi!
More than a decade ago, I used to listen to a so-called walking encyclopedia over the radio. One of the radio listeners verified the information that he had read somewhere:
That if the Earth revolved on its axis at a much faster rate, then time would become faster.
However, this radio...