Question

The following are the data of a collision between a truck and a car.
Mass of the car = 1000 kg,
Mass of the truck = 3000 kg,
Before collision:
Speed of the car = 20 m/s
Momentum of the car = 20000 kg m/s
Speed of the truck = 20 m/s
Momentum of the truck = 60000 kg m/s
After collision:
Speed of the car = 40 m/s in the opposite direction
Momentum of the car = 40000 kg m/s in the opposite direction
Speed of the truck = 0
Momentum of the truck = 0
The collision is
( a.) Both elastic since kinetic energy and momentum is conserved
(b.) Elastic since momentum is conserved
(c.) Inelastic since kinetic energy is conserved
(d.) Elastic since kinetic energy is conserved​

Answer 1

Answer:

b elastic since momentum is conserved