7. A loaded tractor-trailer with a total mass of 5000 kg traveling at hits a loading dock and comes to a stop in 0.64 s. What is the magnitude of the average force exerted on the truck by the dock

Complete Question

A loaded tractor-trailer with a total mass of 5000 kg traveling at  3.0 km/h hits a loading dock and comes to a stop in 0.64 s. What is the magnitude of the average force exerted on the truck by the dock

The value is  

Explanation:

From the question we are told that

  The total mass is  

  The time taken to come to a stop is

   The initial velocity is

Generally the magnitude of the average force exerted on the truck by the dock is mathematically represented as

Here v is the final velocity which is zero since the truck came to a stop

=>    

if the forces acting on an object are unbalanced, the object will accelerate in the direction of the net force on the object.

explanation:

this is best explained by having an understanding of newton's second law, which states that f=ma. you see, when the forces are unbalanced, net force (sum of all forces) is not zero. therefore making it necessary for the object to have an acceleration in the direction of the net force.