a position versus time graph is shown below.
a position versus time graph is shown with y-axis labeled position in meters north up to 20 and x-axis labeled time in seconds up to 10. a line connects points 0, 0 and 1, 4. a horizontal line connects points 1, 4 and 4, 4. a line connects points 4, 4 and 6, 10. a horizontal line connects points 6, 10 and 8, 10. a line connects 8, 10 and 9, 14, and then 10, 15.
use the graph to determine the instantaneous velocity in m/s of the object at 7.0 seconds?
0 m/s
1.4 m/s
7 m/s
10 m/s

i don’t know what the answer is i wish i

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.