The answer would be '<span>The plane of a Foucault pendulum appears to shift its orientation' because it is an experiment to demonstrate the rotation of the earth.
Hope this helps.</span>
Magnets!!, iron is attracted to magnets!
Answer:
Explanation:
In order for the car does not slip, the frictional force must be equal to the centripetal force due to the circular motion. According to the free body diagram:
The frictional force is given by:
The centripetal force is defined as:
Here v is the linear speed and r is the radius of the circular motion. Replacing this equations:
Kinetic energy is an
expression of the fact that a moving object can do work on anything it hits; it
quantifies the amount of work the object could do as a result of its motion. It
can be calculated as:
KE
= mv^2 /2
We
calculate the problem as follows:
KE
= mv^2 /2
400
= m(20)^2 / 2
<span>m
= 2 kg</span>