Considering Newton’s third law, why don’t two equal and opposite forces cancel out each other? 1.Because the two forces act in the same direction
2.Because the two forces have different magnitudes
3.Because the two forces act on different systems
4.Because the two forces act in perpendicular directions

spectral lines lyman is one set

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.

not too sure thinking all accelerations are pointed down

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over