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>
Answer:
As the direction of the centripetal acceleration is always towards inward, towards the center of curvature of the circular path. So the option c is correct that the centripetal acceleration is directed radially inward.
Explanation:
The relation between acceleration and mass is inversely proportional, according to Newton's second law, and there is a direct relationship between acceleration and net external force.
<h3>What are the relation in forces and acceleration?</h3>
One of the most significant laws in all physics is Newton's second law. F = ma, where F (force) and a (acceleration) are both vector values, can be used to represent a body whose mass m is constant. A body is accelerated according to the equation if there is a net force acting on it.
Therefore, An object will remain at rest or move in a straight path at constant speed in the absence of acceleration. A force that is not balanced causes an object to accelerate.
Learn more about acceleration here:
brainly.com/question/1046166
#SPJ1
. The formula for methane is CH4. There are 8 total valence electrons - 1 each for the hydrogen atoms, and 4 for the carbon atom. There are four single bonds, and no lone electron pairs in the methane molecule. With 8 valence electrons and 4 single bonds, we get 8/4=2 electrons per bond.
<span>2. The methane molecule contains four single, or sigma, bonds. Each sigma bond is formed between the 1s orbital of a hydrogen atom, which contains one electron, and one of the four hybrid sp3 orbitals of the carbon atom, each of which contains one electron. That gives us 2 electrons per bond.
</span>
