Answer:
Explanation:
average velocity is 41.6/1.89 = 22.0 m/s
initial velocity u is
22.0 = (u + u - 9.81(1.89))/2
44.0 = 2u - 18.5
62.56 = 2u
u = 31.3 m/s
max height is
v² = u² + 2as
s = (v² - u²) / 2a
s = (0² - 31.3²) / (2(-9.81)) = 49.9 m
49.9 = 41.6 = 8.27 m higher
In process numbers have been rounded to 3 s.d. for reporting purposes.
Answer: I = 9.0 A
Explanation: <u>Ohm's</u> <u>Law</u> is defined as the relationship between voltage and current: in a circuit, the voltage accross a conductor is directly proportional to the current.
The constant of proportionality is Resistance, whose unit is ohm (Ω).
so, Ohm's Law is
V = R.I
It is asked for the current, so, rearraging:

When added two more batteries, the voltage of the circuit triples:
Since they are directly proportional, if voltage triples, so does current:


9.0
The new current, when driven by 3 batteries is 9.0 A.
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