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Radhika Batra Grade: 11
         A scooter company gives the following specifications about its product. 

Weight of the scooter - 95 kg
Maximum speed – 60 km/h
Maximum engine power – 3.5 hp
Pick up time to get the maximum speed – 5 s
Check the validity of these specifications.
3 years ago

Answers : (1)

Navjyot Kalra
askIITians Faculty
654 Points
										Sol. The specification given by the company are

U = 0, m = 95 kg, Pm = 3.5 hp
Vm = 60 km/h = 50/3 m/sec t base m = 5 sec
So, the maximum acceleration that can be produced is given by,
a = (50/3) – 0/5 = 10/3
So, the driving force is given by
F = ma = 95 * 10/3 = 950/3 N
So, the velocity that can be attained by maximum h.p. white supplying 950/3 will be
V = p/F ⇒ v = 3.5 * 746 * 5/950 = 8.2 m/sec.
Because, the scooter can reach a maximum of 8.s m/sec while producing a force of 950/3 N,
the specifications given are some what over claimed.
3 years ago
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