Question

what extra force should an engine of a car develop such that its velocity changes from 5m/s to 25m/s over a distance of 10m ,when the mass of the car is 900kg?​

Answer 1

Answer:

Explanation:

=> It is given that,

Initial speed, u= 5 m /s  ;  

final speed, v = 25 m /s ;

distance, S = 10 m

Force, F = ?

=> Lets find acceleration first by using below formula to get extra force:

v² = u² + 2*a*S

25 * 25 = (5*5)+2*a*10

a = 30 m/s²

=> Force:

F = m*a

F = 900 * 30 = 27,000 N

Thus, Extra force developed by car should be  27,000 N.