The efficiency of an average gasoline-powered car is about 20%. This means
2 answers:
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Answer:
W = 16875 J
Explanation:
We have,
Mass of a motorcycle together with its rider is 150 kg
It is required to find the work is needed to set its movement at 15 metre per second. The work done is given by :
Plugging all the values in above formula such that :
So, the work of 16875 J is needed.
This seems like a right angle triangle situation
the height is 3ft
the base is 4ft
so we're looking for the hypothenus
so we can use the Pythagoras Theorem
which is
the square of the hypothenus is equal to the sum of the square of the two other sides
hyp^2 is equal to opp^2+ adj^2
hyp^2 equals to 3^2 + 4^2
9+16
25
hyp^2 equals to 25
equals to 5
the ramp has to be 5ft long
the height is 3ft
the base is 4ft
so we're looking for the hypothenus
so we can use the Pythagoras Theorem
which is
the square of the hypothenus is equal to the sum of the square of the two other sides
hyp^2 is equal to opp^2+ adj^2
hyp^2 equals to 3^2 + 4^2
9+16
25
hyp^2 equals to 25
equals to 5
the ramp has to be 5ft long