Respuesta :
Answer:
The work done on the car is, W = 75,000 J
The power delivered by the engine, P = 25,000 watts
Explanation:
Given,
The mass of the car, m = 1500 Kg
The initial velocity of the car, u = 0
The final velocity of the car, v = 10 m
The time duration of the travel, t = 3 s
Using the first equation of motion
           v = u + at
           a = (v - u) / t
Substituting the given values in the above equation
          a = (10 - 0) / 3
            = 3.33 m/s²
Using the second equations of motion
           s = ut + 1/2 at²
             = 0 + 0.5 x 3.33 x 3²
             = 15 m
The force exerted by the car
             F = m x a
              = 1500 Kg x 3.33 m/s²
              = 5000 N
The work done by the car,
             W = F x S
                = 5000 N x 15 m
                = 75,000 J
Hence, the work done on the car is, W = 75,000 J
The power delivered by the engine,
              P = W / t
                = 75,000 J / 3 s
                 = 25,000 watts
The power delivered by the engine, P = 25,000 watts
