Read each statement below carefully and state with reasons, if it is true or false. Three vectors not lying in a plane can never add up to give a null vector.

Read each statement below carefully and state, with reasons, if it is true or false : The acceleration vector of a particle in uniform circular motion averaged over one cycle is a null vector.

Read each statement below carefully and state, with reasons, if it is true or false : The net acceleration of a particle in circular motion is always along the radius of the circle towards the centre.

Read each statement below carefully, and state, with reasons, if it is true or false : A wheel moving down a perfectly frictionless inclined plane will undergo slipping (not rolling) motion

Read each statement below carefully and state with reason and examples, if it is true or false. A cslar quantity is one that (a) is conserved in a proces (b) can never take negative values (c ) must be dimensionless (d) does not vary from one point to another in space (e ) has the same value for observers with differnt orientations of axes.

Read each of the statement below carefully and state, with reasons, if it is true or false. (a) The modulus of elasticity of rubber is greater than that of steel. (b) the stretching of a coil is determined by its shear modulus.

Read each staremnt below crefully and state, with reasons, if it is true or false : (a) The net acceleration of a particle in circular motion is always along the radius of the circle towards the centre. (b) The velocity vector of a particle at a point is always aling the tagent to the path of the partile at that point. ltbRgt (c ) The acceleration vector of a particle in uniform circular motion acraged over one cycle is a null vector.

Read each statement below carefully and state with reasons, with it is true or false : (a) The magnitude of vector is always a scalar. ltBrgt (b) Each component of a vector is alwarys a scalar. (c ) The total path length is always equal to the magnitude of the displacement vector of a particle. (d) The average speed of a particle (defined as total path length diveked by the time taken to cover the path ) is eigther greater or equal to the magnitude of average velocity of the particle over the same interval of time. ltbRgt (e ) three vectors not lying in a planc ecan never add up to give a null vector.

Read each statement below carefully and state with reasons, if it is true ot false. (a) During rolling the force of friction acts in the same direction as the direction of motion of c.m of the body. (b) The instantaneous speed of the point of contact during rolling is zero. (c ) The instantaneous acceleration of the point of contact during rolling is zero. (d) For perfect rolling motion, work done against friction is zero. (e) A wheel moving down a perfectly frictionless inclined plane will undergo slipping (not rolling motion).

Read each staremnt below carefully and state with reasons and expamples if it is true or false , (a) with zero speed at an instant may have non-zero accelration at that instant (b) with zero speed may have non-zero velocity (c ) with positive speed must have zero accleration (d) with positive value of acceleration must be speeding up.