A train moves from rest to a speed at 25m/s in 30.0 seconds. What is it’s acceleration?
1 answer:
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Answer:
When he weight of the car is 8.55 x N then power = 314.012 KW
When he weight of the car is 1.10 x N then power = 43.76 KW
Explanation:
Given that
Initial velocity = 0
Final velocity = 24.8
Time = 7.88 sec
We know that power required to accelerate the car is given by
P =
Change in kinetic energy Δ K.E =
Since Initial velocity = 0
⇒ Δ K.E =
⇒ Power P =
⇒ Power P = -------- (1)
(a). The weight of the car is 8.55 x N = 8550 N
Put all the values in above formula
So power P =
P = 314.012 KW
(b). The weight of the car is 1.10 x N = 11000 N
Put all the values in equation (1) we get
P =
P = 43.76 KW
Answer:
y = 1.06 x + 0.14
r² = 0.95
Explanation:
a) To make this graph, a spreadsheet-type calculation program is used, see attached.
On the y axis are the measured values
On the x-axis, the values checked in the experiment are placed.
From the graph we see that a linear graph and that one of the values has a strong deviation with respect to the others
b) The red line is the best straight line that can be drawn,
for this the quality ajust is r²
the closer to 1 the better the fit
the equation of the line is
y = 1.06 x + 0.14
r² = 0.95
The Correct Answer Is A:
Wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves.
