Question

please give answer of part e)

only. Your Physics teacher is giving you a special gift, a box of mass 20
kg with a mystery surprise inside. The box is placed on a
frictionless table,
(a) What is weight of the box and normal reaction over it by the table?
(b) If you pushes down that box with 80 N, Now what is
Normal Reaction in this case?
(c) If you pulls up reaction box with 80 N, Now what is Normal
reaction in this case?
(d) What happens, if you pulls up that box with 200 N force
rather than 80 N?
(e) To guess what is inside, if you are pulling it at an Your Physics teacher is giving you a special gift, a box of mass 20
kg with a mystery surprise inside. The box is placed on a
frictionless table,
(a) What is weight of the box and normal reaction over it by the table?
(b) If you pushes down that box with 80 N, Now what is
Normal Reaction in this case?
(c) If you pulls up that box with 80 N, Now what is Normal
reaction in this case?
(d) What happens, if you pulls up that box with 200 N force
rather than 80 N?
(e) To guess what is inside, if you are pulling it at an angle of 30° with
force 80 N with horizontal, what is
(i) Acceleration of box?
(ii) Normal Reaction exerted on the box by the table?
(f) At the time of pulling it, you are saying to your teacher 'Sir, What
the force I am applying on box, same force box is applying on me
(Action - Reaction Pair), these two forces are getting balanced so I
can not pull it.. Justify this Statement !! of 30° with
force 80 N with horizontal, what is
(i) Acceleration of box?
(ii) Normal Reaction exerted on the box by the table?
(f) At the time of pulling it, you are saying to your teacher 'Sir, What
the force I am applying on box, same force box is applying on me
(Action - Reaction Pair), these two forces are getting balanced so I
can not pull it.. Justify this Statement !!​

Answer 1

Answer:

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Explanation:a. m=20kg, gravity of earth=10N

weight= 20*10= 200N

No change of position of box.

b. the box will easily come down because it has already 200N force.

c. if we pull up it will not go up as force applied for getting up is lesser than already applied force which is 200N.

d. position will not change, fixed in same place as both have same force.

f. if applied force of a person and another body is same then termed as balanced force which doesn't allow body to move. this is Third law of reaction of Newton, according to that every action has equal and opposite reaction.