O Question 9 Retaken
A driver drives at a speed of 19.0 m/s. If she brakes to a stop in 7.0 s, what is the magnitude of her deceleration in m/s2?

1.35
The answer I got was wrong and now I am confused pls can you help me

truck y has a greater velocity than truck x.

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.

this would be about 43%

the ima (higher than 1m) will be greater than the ima with the height of 1m.