in which case the force applied will be more by a car or truck if both are moving with the same velocity
Answers
A truck and a car are moving with same velocity. If breaks are applied at the same time, which would cover more distance till they are at rest?
If a body has a mass and velocity than it definitely has momentum(mass x velocity). Momentum is directly related to Force. So larger the momentum of a body the larger force would require to completely stop a body. Now according to the question there is a Car and a Truck. So by general assumption Truck will have higher mass than Car. Both are moving with same velocity therefore by the formula we come to know that momentum of truck will be greater than that of car(because it has higher mass) . Now if we take assumption that the frictional force produce by the brakes of Car and Truck are same and also the frictional force produce by surface on the tyres of both Car and Truck are same than in that case the force applied to stop both car and truck would be same.Now since the momentum of Truck is greater than that of Car and since same amount of force is applied to stop both of them then, therefore because of greater momentum the Truck will drag farther than the Car.
Because we know Force= rate of change of momentum.
The mass of truck is more than the mass of car hence force applied by the truck will be greater.
Hope this helps.