Question

a horizantal force of 100 n is required to push a box across a factory floor at a constant speed. what is the net force acting on the box?

Answer 1

0

Answer 2

my only problem is that i dont know how mush this box weights

Answer 3

why?
plz

Answer 4

okay the vertical forces are:
1-normal force
2-weight of that body
while there is only a horizental force which is:
the force that moved the body (F)
and
F=ma
while v is constant so a = 0
and so
F=0
so the resultant force is ZERO

Answer 5

get it?

Answer 6

what do you mean by v?

Answer 7

there is no acceleration therefore no imbalance of force. Fnet=0

Answer 8

velocity is constant means acceleraction is zero

Answer 9

did you get it ma friend?

Answer 10

so when the qustion said at constant speed it meant the speed that is already on it in this moment?

Answer 11

Think of force as what is required to change the object's velocity.
Likely you have a constant velocity right now sitting at your computer (Velocity = 0) This velocity is constant and there is no acceleration. This could also be the case if you had some positive or negative velocity. That still allows for gravity (and other forces) to pull you down and you likely feel your chair pushing equally back on you. Fnet = 0 because there is no change in velocity.

Answer 12

so the qustion did mean the velocity in the moment that mean its initial velocity right?

Answer 13

no it does not mean that.
it means that its intial velocity and final one are the same (constant)

Answer 14

ohh okay thanks

Answer 15

Yeah if velocity is constant, no acceleration is being experienced and all forces are balancing each other out; \[\Large \sum {F = 0} \]