A student suspends a barmagnet by a thread and writes the following statements in her copy :
S1 - The bar magnet comes to rest in such a position that one end points in the north and the other in the south direction
S2 - A freely suspended magnet aligns in North - South direction
Which of the following statements is/are correct ?

Which of the following statements about average velocity is NOT correct?

A ball is dropped from rest. What will be the velocity of the ball after falling 20 m? (Take g = 10 m/s²)

A convex lens forms an image of an object placed 30 cm away. The image is formed at 60 cm on the other side. The magnification is:

If the acceleration of a body is halved and mass remains constant, the force will