Answer:
Mass and thus force depends on the reference frame chosen
Explanation:
This can be explained as Newton's law of gravity provides action which are instantaneous at a distance and involves the evaluation of all the quantities at present time or at the instant they occur.
If the body undergoes a change in its mass distribution there will be an immediate change in its gravitational force without any lag.
Now, if we talk about special relativity, it would be absurd to say that an information can travel faster than light. The effect is in synchronization with the cause in one reference frame where the effect occurs after the cause for some observer in some other reference frame.
In order to observe Newton's law of gravity all the observer's in different reference frames must observe the same phenomena which could only be possible if time were absolute and in special relativity, time is not absolute.
Therefore, Newton's law of gravity was inconsistent with the Einstein's Special Relativity.
Answer: kinetic energy remains constant.
Explanation: The force on the charged particle is always perpendicular to the direction of its movement. Also, magnetic forces cause charged particles to change their direction of motion, but they do not change the speed of the particle. If the force is perpendicular to the motion, then no work is done. Hence magnetic forces do no work on charged particles and cannot increase their kinetic energy. Kinetic energy is therefore remain constant.
Answer:
Mechanical advantage is the measure of the force amplification achieved by using a tool , mechanical device or machine . ... So MA = 2 means that for example if you apply 100 N then your machine will multiply that force and generate 200 N..
Explanation:
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<u>Analysing the Question:</u>
We are given:
initial velocity (u) = 100 m/s
final velocity (v) = <em>v m/s</em>
distance (s) = 125 m
acceleration (a) = 5 m/s²
<u>Solving for Final Velocity (v):</u>
from the third equation of motion:
v² - u² = 2as
v² - (100)² = 2(5)(125)
v² - 10000 = 2500
v² = 2500 + 10000
v² = 12500
v = 111.8 m/s
Answer:
○ 0
Explanation:
Even if the athelete runs four laps of a 400 m track, its displacement will be 0 because the displacement is the shortest distance from its to final position. And, here the final and initial position is same since he comes to its initial position after covering certain distance. So, displacement is 0.