out pushing wall to A person is leaning against the wall that exerted byr by the
ID: 1789789 • Letter: O
Question
out pushing wall to A person is leaning against the wall that exerted byr by the ne Wall on her hand. What is the type of f wall on her hand called compare the force exerted by her hand on the c- the in (c), is the force tive? Explain. Explain ore exverted by the wall on the person's hand passive or a exerted by the per- e force the force exerted son l compare the horizontal component of th son's feet on the floor to the by the floor on her feet. her feet called? the floor otthe floor to the horizontal component called? ner fet. What is the type of force exerted by the floor f. oor Is the force d active? Explain. exerts on t 8 A truck attempts to tow a car. They are connected by a 2-m-long rope. At first the truck doesn't pull hard enough, and the car doesn't move. Com- pare the force exerted by the truck's bumper on the rope to that exerted by the rope on the truck's bumper. Also compare the force exerted by the rope on the car's bumper to that exerted by the car's bumper o the rope. Finally the truck pulls hard enough so that the car begins to move. Com- pare the same pairs of forces as in (g) to each other. h. An elevator is hanging from a strong cable. The elevator is at rest. Com- pare the force exerted by the cable on the elevator to that exerted by the elevator on the cable. i.Explanation / Answer
c. for the person pushing against the wall, force by hand on the wall = force by wall on the hand ( because both forces are action reaction pairs and hence are equal according to newton's third law)
this type of force is called normal reaction ofrce
d. force exerted by wall on person's hand is passive as it is a result of the force exeerted by the person's hand on the wall which is active
e. the horizontal component of the force exerted on person's feet = horizontal component of the force exerted by the person's feet on the floor (because its an action reaciton pair)
this force is the friction force
f. the force person exerts on the floos is passive as it is a result of the active force being applied by the hands on the wall
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