Question

A 6.5 x 104 W engine exerts a constant force on of 5.5 x 103 N on a car, the resulting velocity is?
a. 0.085 m/s b. 12 m/s c. 0.0 m/s d. 3.6 x 108 m/s

Answer 1

Answer:

12m/s

Explanation:

Given parameters:

Power = 6.5 x 10⁴W

Force  = 5.5 x 10³N

Unknown:

The resulting velocity  = ?

Solution:

 The velocity of a body is related to force and power using the expression below;

            Power  = Force x velocity

Insert the parameters and solve for velocity

         6.5 x 10⁴  = 5.5 x 10³ x velocity

          velocity  = $\frac{6.5 x 10^{4} }{5.5 x 10^{3} }$   = 12m/s