A train is moving at 15ms-1. It slows down to 10.5ms over a time of 4s. Calculate the distance it travels before stopping if acc
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Total rate at which electrical energy is dissipated by the two resistors are V²/R or I²R.
<u>Explanation:</u>
When the two resistors are combined in series then the total resistance gets added.
If and
are in series then total resistance, R =
Total resistance becomes + 19 Ω
The total electrical power dissipated is equivalent to the power dissipated.
We know,
Power = V²/R or
Power = I²R
where, V is the potential difference between the ends
I is the current supplied.
Therefore, total speed at which electrical power is consumed by the two resistors are V²/R or I²R.
Answer:
a)Velocity of car =v=16 m/s
b)Force against the track at point B=1.15*N
Explanation:
Given mass of roller coaster=m=350 kg
Position of A=Ha=25 m
Position of B=Hb=12 m
Net potential energy=mg(ha-hb)
Net potential energy=(350)(9.80)(25-12)
Net potential energy=44590 J
Using energy conservation
net kinetic energy=net potential energy
(1/2)mv^2=mg(ha-hb)
m=350
velocity=v=16 m/s
b)There two force acting,centripetal force upward and gravity downward.
Thus net force acting will be
Net force=(mv^2/r)-mg
Net force=14933.33-3430
Net force=1.15* N