Question

A truck of mass 2500 kg moving at 15 metre per second collides with the car of mass 1000 kg moving at 5 metre per second in a positive direction with what velocity would need to move together

Answer 1

Answer:

Negative sign with u 2 u2 indicates that u 2 u2 is in a direction opposite to u 1 u1. If v v is the combined velocity of the two, then applying the principle of conservation of linear momentum, we get m 1 u 1 + m 2 u 2 = ( m 1 + m 2 ) v m1u1+m2u2=(m1+m2)v or 2500 × 15 + 1000 ( − 5 ) = ( 2500 + 1000 ) v 2500×15+1000(-5)=(2500+1000)v or 37500 − 5000 = 3500 v 37500-5000=3500v or v = 32500 3500 = 65 7 = 9.3 m / s v=325003500=657=9.3m/s Positive sign of v v indiacates that the resultant velocity is in the direction of motion of the truck.Read more on Sarthaks.com - https://www.sarthaks.com/1161331/truck-mass-2500-moving-collides-with-1000kg-moving-opposite-direction-with-what-velocity?show=1161631#a1161631