Question

An 1875kg car going at 23m/s hitd from behind 1025kg going at 17m/s the same direction. The two cars stick together. How fast do the two cars move together immediately after coalition

Answer 1

1875 kg car- U1;M1

1025 kg car- U2;M2

Step-by-step explanation:

according to Law of conservation of linear momentum

M1×U1 + M2×U2 = M1×V + M2×V

1875×23 +1025×17 = V(1875+1025)

43125 + 17425. =V×2900

V =60550/2900

V =20.88 ms-1

the two cars move with a speed of 20.88ms-1 immediately after coalition