Crall and whipple design a loop-the-loop track for a small toy car. the car starts at height yi above the bottom of the loop, goes through the loop of radius r, and then travels along a flat, horizontal track before coming to rest. rolling friction between the horizontal track and the car is significant, but it is negligible along the rest of the track. assume crall and whipple release the car from the minimum height yi = 5r/2. if the coefficient of rolling friction between the car and the horizontal track is 0.02 and the radius of the loop is 0.63 m, how far does the car travel along the horizontal track from the base of the loop before coming to rest?

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.