Question

Let f be the force acting on a particle having position vector r and be the torque of this force about the origin. Then,

Answer 1

ahhh....its simple......this is because T=r cross F

the cross product of r and F (i.e T)is perpendicular to both r and F....now the question is how come r.T and F.T= 0 ....this is how: the dot product of two vectors can be written as a.b cos theta(a and b being two vectors...) as cos of 90 degrees is =0 and since T is perpendicular (at 90 degrees)to both r and F ...the result comes out to be zerooo....... HOPE THAT HELPED :)

dhanyavad

please select my answer as brainliest answer

#shreya

Answer 2

Answer:

Explanation:

Torque bar equals to r bar into f bar

r bar into torque bar equals to 0

F bar into torque bar equals to zero