Answer: B) 30 km/h
Explanation:
The speed of Ben and Jerry on their way to the store is given by
where
d is the distance they covered
t is the time they took
From the graph, we see that Ben and Jerry travelled for a distance of d=60 km in a time of t=2 h, so their speed is
Answer:
They are driving at the speed of 30 km/h
From the graph it is clear that,
Total distance covered by Ben and Jerry, d = 60 km
The distance of 60 km is covered in 2 hours.
We have to find how fast they drive on their way to the store i.e their speed. We know that,
Hence, the correct option is (B) " 30 km/h ".
500000000 lbft/s
F = Force or weight = 1000000 lbf
s = Displacement = 10000 ft
t = Time taken = 20 seconds
Work done is given by
Power is given by
One Saucer power is 500000000 lbft/s
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