as a function of time as it moves along the a-axis. Which of the graphs below be

Question

as a function of time as it moves along the a-axis. Which of the graphs below best shows the net force versus time for this object? -The graph to the right shows the velocity of an object 's SFx E- D. C. 11 -A lightweight crate (A) and a heavy crate (B) are side-by-side on a hozontal oor You apply a horizontal force F to crate A. There is friction between the crates and the floorif the two crates are occeleroting to the right A crate A exerts more force on crate 8 than 8 exerts on A B. crate A exerts less force on crate B than B exerts on A C crate A exerts as much force on crate 8 as B exerts onA D. answer depends on the details of the friction force. E. answer depends on the magnitude of the acceleration. 12- A lightweight crate (A ) and a heavy crate (8) are side-by-side on a frictionless horizontal surface. You apply a horizontal force F to crate A, causing A and B to accelerate together to the right. How do the magnitudes of the following forces compare: () the force F. (i)the net force on A and (ii) the net force on B ? A. F net force on A = net force on B B. F> net force on A net force on B C F> net force on A >net force on B D. F> net force on 8> net force on A E. none of the above 13- A woman pulls on a 6.00-kg crate, which in turn is 6.00kg 4.00 kg connected to a 4.00-kg crate by a light rope The light rope remains taut. Compared to the 6.00-kg crate, the lighter 4.00-kg crate A. is subjected to the same net force and has the same acceleration. B. is subjected to a smaller net force and has the same acceleration. C is subjected to the same net force and has a smaller acceleration. D. is subjected to a smaller net force and has a smaller acceleration. E. is none of the above

Explanation / Answer

given,

velocity time graph

since force = mass * acceleration

force is directly proportional to acceleration so,

acceleration time graph will correcctly depict the force time graph

now,

slope of velocity time graph = change in y axis / change in x axis

slope of velocity time graph = change in velocity / change in time

change in velocity / change in time = acceleration so,

slope of velocity time graph = acceleration

from graph we can deduce 2 points

a) for part of graph which is parallel to the x axis slope(acceleration) will be 0

b) for middle portion of the graph there is some constant value of slope(acceleration)

only graph that satisfied these two conditions is graph E so,

Graph E shows force versus time for given object

*kindly post 1 question at a time

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