A 1050 kgkg sports car is moving westbound at 15.0 m/sm/s on a level road when it collides with a 6320 kgkg truck driving east on the same road at 12.0 m/sm/s . The two vehicles remain locked together after the collision. A) What is the velocity (magnitude) of the two vehicles just after the collision?
B) At what speed should the truck have been moving so that it and car are both stopped in the collision?
C) Find the change in kinetic energy of the system of two vehicles for the situations of part A.
D) Find the change in kinetic energy of the system of two vehicles for the situations of part C.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

it is a negative acceleration

it is b. absorbs thermal energy