KE= 0.5(m)(v^2)
KE= 250,000 J
We can answer this using one of the equations of linear
motion:
v = d / t
where:
v = velocity
d = distance
t = time
<span>In the problem, we are asked to find for the time in
which Driver B will catch up to Driver A. Therefore, find the time when dA = dB. Rearranging the
equation and equation dA and dB will result in:</span>
<span>vA * tA = vB * tB
---> 1</span>
It was given that:
vA = 68 mph
tA = tB + 3 (since person A was travelling 3 hours
earlier)
vB = 85 mph
tB = unknown
Substituting into equation 1:
68 * (tB + 3) = 85 * tB
68 tB + 204 = 85 tB
tB = 12 hrs
Therefore driver B would catch up to driver A after 12
hrs.
<span> </span>
The total distance travelled is 307.5 miles.
<h3>What is the distance covered?</h3>
We know that the distance covered can be obtained from the formula from speed since the motion all took place in the same direction.
Speed = distance/time
distance = speed * time
In the first case;
Distance = 35 mph * 2.5 hours = 87.5 miles
In the second case;
Distance = 55 mph * 4.0 hours = 220 miles
Total distance = 87.5 miles + 220 miles = 307.5 miles
Hence the total distance travelled is 307.5 miles.
Learn more about total distance:brainly.com/question/20330990
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Answer:
Protons have about the same mass as electrons is false
Explanation:
Electrons and protons have the same magnitude on charge but opposite sign
: charge of electron
: charge of proton
Neutrons have no charge.
An atom is composed of protons and neutrons in the nucleus and electrons surrounding it, so a neutral atom has the same number of protons and electrons to has a net charge of zero. So, all the facts mentioned are true.
The false one is that protons have about the same mass as electrons, because the mass of an electron is 
and the mass of a proton is 
so the mass of a proton is a lot of bigger than electron mass.
Laws that implemented the consumers' right to be informed forbid misleading advertising.
Answer is C.
