does it mean that tension is greater than mg? and what is the direction of acceleration
2007-01-26 02:41:55 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Physics
T = tension in the string
mg = weight of body
ma = Rest force of T (tension) after balancing mg (weight of body) with which body moves upward ; So clearly T(tension ) > mg (weight of body) and acceleration upward &
mg - T = ma [rest force of mg (weight of body) after balancing T (tension in string) with which body moves downword] ;here mg(weight of body) > (tension in the string ) and acceleration is downword ........
2007-01-26 06:09:15 · answer #1 · answered by Anonymous · 0⤊ 0⤋
If T is greater than mg then T- mg will be positive.
Therefore, ma will be positive. The direction of ma will be in the direction of T.
If T = mg then T-mg = 0 and hence a =0.
If T is less than mg, then T- mg will be negative.
Therefore, ma will be negative. The direction of ma will be in the direction of mg.
However the last case is rare.
2007-01-26 11:16:59 · answer #2 · answered by Pearlsawme 7 · 0⤊ 0⤋
if the expression is positive it implies that the body would be moving towards the direction of T with and acceleration a.
T, mg and ma are all forcesand the body moves in the direction of the resultant force acting on the body
2007-01-26 11:23:20 · answer #3 · answered by Ankit K 1 · 0⤊ 0⤋
Isn't g gravity which is an accelleration? So to me it implies that Tension is 0 since m=m. In that case, a would be down since g is negative.
2007-01-26 11:02:47 · answer #4 · answered by r_leucht 2 · 0⤊ 0⤋
yes T is greater than mg. direction upwards.
2007-01-26 11:02:11 · answer #5 · answered by neha 1 · 0⤊ 0⤋
it implies nothing it is actually newtons 2nd law of motion. for ur question, if value of a is negative then mg is rater then T and viceversa
2007-01-28 07:08:33 · answer #6 · answered by ishan m 1 · 0⤊ 0⤋