When the object slides across the rough surface some of its potential energy will be lost to friction.
<h3>Conservation of mechanical energy</h3>
The law of conservation of mechanical energy states that the total mechanical energy of an isolated system is always constant.
M.A = P.E + K.E
When the object slides across the rough surface, some of the potential energy of the object will be converted into kinetic energy while the remaining potential energy will be converted into thermal energy due to frictional force of the rough surface.
P.E = K.E + thermal energy
Learn more about conservation of energy here: brainly.com/question/166559
Answer:
Explanation:
The change of frecuency of sound due to the movement of the source is colled Doppler Effect.
As James (the source) is running toward the wall, the frecuency reaching the wall (so the eco sound) will be higher than the source. In this case the frecuency at the wall will be:
where is the speed of source, 2 m/s
and is the speed of sound, given that we have wind movind the air in the opposite direction respect to the wall, the speed of sound would be:
Replacing the values:
Now the wall becames the new source, and James (the observer is aproaching the source), for an observer aproaching the source the new frecuency will be:
Now the waves are traveling in the direction of wind, so the velocity of sound will be:
Replacing:
<span>This problem asks that we compute the magnitude
of the maximum stress that exists at the tip of an internal crack
</span> sigmam=2*(sigma0)(a/(pt))^(1/2)
sigmam= 2*(180)*(((3.5×10^-2)/(2))/(4.5×10-4))^(1/2)=2245 MPA (325609.7 PSI)
Answer: 31.85 m/s
Explanation:
Since we are talking about constant acceleration, we can use the following equation to find the speed of the rocket:
Where:
is the distance the rocket has traveled
is the time in which the rocket has traveled the distance
Solving the equation with the given data:
This is the rocket's speed