Question

2. A car A of mass 2500 kg, travelling at 20 m's collides with another car B of mass 1100kg
travelling at 25 m/s in the same direction. After collision, the velocity of car A becomes 10m's.
Calculate the velocity of car B after collision​

Answer 1

Explanation:

momentum =

m1v1+m2v2=m1u1+ m2u2

here , m1=2500 kg

m2= 1100kg

v1=10m/s

v2=?

u2=20m/s

u1=25m/s

According to above equation

2500×10+1100×v2= 2500×25+1100×20m/s

26100×v2= 64700

v2 = 64700/26100

v2=2m/s