Question

7. A 1.50 x 103 kg car accelerates uniformly from rest to 10.0 m/s in 3.00 s.

Answer 1

75,000‬J

25,000W

Explanation:

Given parameters:

Mass of car = 1500kg

Velocity  = 10m/s

time taken = 3s

Unknown:

Work done = ?

Power delivered by engine = ?

Solution:

Work done here is the kinetic energy possessed by the car as it covers the distance.

Work done and energy are related quantities.

  Work done = Kinetic energy = $\frac{1}{2}$ mv²

m is the mass of the body

v is the velocity

   Therefore, inputting the parameters gives:

      K.E  = $\frac{1}{2}$  x 1500 x 10² = 75,000‬J

The work done is 75,000‬J

Power is the rate at which work is done:

   Power = $\frac{work done }{time}$

 Power = $\frac{75000}{3}$ = 25000W

learn more:

Kinetic energy brainly.com/question/9059731

Power supply brainly.com/question/4322575

#learnwithBrainly