Explanation:
In Europe the standard voltage in homes is 220 V instead of the 120 V used in the United States.
100-W European bulb would be intended for use with a 220-V potential difference.
(a) If V = 220 V and P = 100 W
Power :
If you bring a "100-W" European bulb home to the untied States, what should be its US power rating. So,
or
P = 29.8 watts
(b) Let I is the current will the 100-W European bulb draw in normal use in the United States. So,
Hence, this is the required solution.
Answer:
Explanation:
Hello,
In this case, since the acceleration in terms of position is defined as its second derivative:
The purpose here is derive x(t) twice as follows:
Thus, the acceleration turns out 4.8 meters per squared seconds.
Best regards.
1) The time taken is 3.06 s
2) The distance between the two points is 119.4 m
Explanation:
1)
The motion of the object is a free fall motion, so it is a uniformly accelerated motion with constant acceleration towards the ground. So, we can solve the problem by using the following suvat equation:
where
v is the final velocity
u is the initial velocity
a is the acceleration
t is the time taken
In this problem we have
u = 54 m/s is the initial velocity (at point A)
v = 24 m/s is the final velocity (at point B)
is the acceleration (negative since it is downward)
Solving for t,
2)
For this part of the problem, we can use another suvat equation:
where
v is the final velocity
u is the initial velocity
a is the acceleration
s is the distance covered
In this problem we have
u = 54 m/s
v = 24 m/s
Solving for s, we find the distance between point A and point B, which is the distance covered by the object:
Learn more about accelerated motion:
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