a man of mass is running at constant acceleration of 0.55m/s square.What force is required to stop the man
Answers
Answer:
To bring the man to a halt, you must provide an equal but opposite force to the one applied by the man. This only means you need to calculate the force he is exerting:
F = m . a
That is, the force is equal to the multiplication between his mass (60) times his acceleration (0.25), which gives 15 N. Keep in mind that forces are vectors, so you must indicate also that the direction of this force is opposite to the direction of his acceleration.
Update: I was notified by a comment of something I mistook in the question. The above answer would bring him to constant speed (thus 0 force) but will not stop the man if he had enough time to accelerate above the rest speed 0 m/s. There are not enough givens to answer when or how far he will stop.
Answer:
44kgm/s
hope this is correct