Physics, 27.06.2019 09:30, lilyella1004

A12kw motor moves a 1000kg car at what constant velocity, if the motor applies a force that equals 2000n? also, of the motor for 2.75s, what amount of work has the motor done on the car. (show working out)

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answered: isabelperez063

Given data

Power = 12 KW ,

mass (m) = 1000 kg ,

Force (F) = 2000 N ,

time (t) = 2.75 s

Determine

1. Velocity (v) = ?

2. Work (W) = ?

We know that Power (P) = Rate of doing work

= ( Work ÷time) KW

Also we know that Work = F × displacement

Force = m.a N

=> 2000 = 1000 × a

=> a = 2 m/s²

And we know that acceleration (a) = rate of change of velocity

= v ÷ t

=> v = a × t

= 2 × 2.75

= 5.5 m/s

Now determine the Power P = Work done ÷ time

12 = W ÷ 2.75

W= 12 ×2.75

= 33 KJ

= 33000 J

answered: Guest

Amethod of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.

answered: Guest

From negative to negative

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A12kw motor moves a 1000kg car at what constant velocity, if the motor applies a force that equals 2...