Question

2. A truck and a small car are both going 10 mph when they collide head on. a. Does the truck or the car experiences the largest force during the collision? Why? b. Which experiences the largest impulse during the collision? Why? c. Which experiences the largest change in momentum during the collision? Why? d. Which will experience the largest change in velocity? Why? 3. What is the difference between elastic and inelastic collisions?

Answer 1

Both experiences game tonce. There is equal and opposite for every action reaction Impulse change in momentum. - both experiences change in momentum is same. as there is no external force on a momentum is conserved Both experiences same change in momentum fom Conservation of linear momentum. d truck will expirience large change in velocity m(V-u) = Constant v-ual which has smaller in speed. man that has big change *3 elastic collisions. The collisions in which total energy in which total is Conserved. inelastic collisions! The collisions energy is not conserved

Answer 2

2

a)

Each of truck and car experiences same amount of force in opposite direction. This can be explained on the basis of Newton's third law according to which every action has equal and opposite reaction. So each of car and truck experience same amount of force as they apply on the other in opposite direction.

b)

Since each of truck and car experience same amount of force and time of contact is also same for both car and truck. hence the car and truck experience equal amount of impulse.

c)

For each car and truck , we have

Impulse = Change in momentum

Since each car and truck experience same amount of impulse, hence change in momentum is also same for each .

d)

for the same change in momentum, the change in velocity is larger for the object having smaller mass. hence the car will have greater change in velocity as it has smaller mass.

3.

In elastic collision, the total kinetic energy before and after the collision is conserved while in inelastic collision there is loss of energy and hence the total kinetic energy before and after the collision is not conserved.