Acar x of mass 1000kg moves at a speed of 20m /s in direction due east collides head on with an other car y of mass 1500kg moves at 15m/s in a direction due west if two cars stick together find their common velocity after collision

17 m /s is the common velocity after collision

the answer is b

explanation:

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.