Which of the following quantities are always zero in a S.H.M. ? Here, `vec(r),vec(upsilon)`and `vec(a)` represent amplitude, velocity and acceleration vectore.

A particle performs SHM along a straight line and its position is vec(R ) , acceleration is vec(a) , velocity is vec(v) is and force on particle is vec(f) . Then which of the following statement are true? (i) vec(v). vec(a) is always + ve (ii) vec(v).vec(R ) may be -ve (iii) vec(f).vec(R ) is always -ve (iv) vec(v) is parallel to vec(f) sometimes

Which of the following statements are true. Statement-I: (vec(r ).vec(i)) (vec(r )xx vec(i)) + (vec(r ).vec(j)) (vec(r ) xx vec(j)) + (vec(r ).vec(k)) (vec(r )xx vec(k)) = vec(r ) Statement-II: If vec(a) xx vec(b)= vec(0), vec(a).vec(b)=0 , then one of vec(a),vec(b) is a null vector.

If overset(vec)(F) is force vector, overset(vec)(v) is velocity , overset(vec)(a) is acceleration vector and overset(vec)(r) vector is displacement vector w.r.t. mean position than which of the following quantities are always non-negative in a simple harmonic motion along a straight line ?

If overset(vec)(F) is force vector, overset(vec)(v) is velocity , overset(vec)(a) is acceleration vector and overset(vec)(r) vector is displacement vector w.r.t. mean position than which of the following quantities are always non-negative in a simple harmonic motion along a straight line ?

If a parallelogram is formed with two sides represented by vector vec(a) and vec(b) , then vec(a)+vec(b) represents the

If a parallelogram is formed with two sides represented by vector vec(a) and vec(b) , then vec(a)+vec(b) represents the

Is (vec a.vec b)vec c a vector quantity.