## Central force and torque … msa

Question 10: A central force is one that is always directed towards the same point. Can a central force give rise to a torque about…

## Never use a long wrench to tighten a small bolt … msa

Question 9: Explain the warning, ‘never use a long wrench to tighten a small bolt’. Answer When we tighten (or loosen) a bolt with a…

## Torque on the opening door … msa

Question 8: To open a door that has the handle on the right and the hinges on the left a torque must be applied. Is…

## Particle under the action of a single force is not in equilibrium … msa

Question 7: Why a particle experiencing only one force cannot be in equilibrium? Answer In case a body to be in equilibrium, we know one…

## Conceptual Question on Vectors and Equilibrium … msa

Question 6: Suppose you are given a known non-zero vector A. The scalar product of A with an unknown vector B is zero. Likewise, the…

## How can scalar and vector product of non-zero vectors is zero … msa

Question 5: A and B are two non-zero vectors. (a) How can their scalar product be zero? And (b) how can their vector product be…

## Scalar Product of two vectors may be negative … msa

Question 4: Can the scalar product of two vectors be negative? Provide a proof and give an example Answer Yes, the scalar product of two…

## Units associated with unit victors, msa

Question 3: What units are associated with unit vectors, î, ĵ and k̂? Answer Unit vectors have no units. It just specifies the direction along…

## Conceptual question 2, Vectors and Equilibrium … msa

Question 2: The magnitudes of three vectors are 2 cm, 3 cm and 5 cm, respectively. The directions are at your disposal. Can these vectors…

## Adding three vectors may give a null vector … ms

Question 1: Is it possible to add three vectors of equal magnitudes but different directions to get a null vector? Illustrate with a diagram. Answer…