A person is going on a trail run was running for 90 minutes (assume 2 sig figs). If the runner was able to maintain an average pace of 6.0 mi/hr in the direction of increasing mile markers and they ended at mile marker 15.0, what mile marker did they start from?

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.

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray