1. A truck with a mass of 1500 kg is traveling along a long starch of road at 35

Question

1. A truck with a mass of 1500 kg is traveling along a long starch of road at 35 m/s. When suddenly an automated Tesla with a mass of 950 kg run head on into the truck. If there is not net acceleration from both vehicle, and the collision is in elastic. What is the final velocity of the two vehicles smashed together?

2. Jim Bob has a basketball with a mass of 1 kg. He can throw the ball down at a velocity of 7 m/s. If he throws his ball at another basketball at another basketball what will happen? What will the velocity the other ball be?

3. (True/ False)
A. In collisions momentum is always conserved. ______________
B. In an inelastic collision kinetic energy is conserved. ______________
C. In an elastic collision kinetic energy is always conserved. ______________

4. If a cart has a momentum (P) of 17 [kg m/s] and a velocity of 10 m/s. Then what is the cart’s mass?

5. What is the difference between an elastic and inelastic collision?

Explanation / Answer

1)

conserving momentum

1500x35 = 1500v1 + 950 v2

for elastic collision

35 = v2-v1

v2 = 42.85m/s

v1 = 7.857 m/sec

2)

the velocity of other ball will be 7 m/sec as in elastic collision between equal masses velocity gets exchanged

3)

A true

B False

C true

4)

17 = 10 x,m

m = 1.7 kg

5)

in elastic collision momentum and energy are conserved

in inelastic collision only momentum is conserved

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