An elastic metal rod will change its length when it a) falls vertically under its weight b) is pulled along its length by a force acting at one end c) rotates about an axis at one end d) slides on a rough surface

An elastic metal rod will change its length when it a) falls vertical

1.	An elastic metal rod will change its length when it a) falls vertically under its weight b) is pulled along its length by a force acting at one end c) rotates about an axis at one end d) slides on a rough surface
Answer» only a, B are true only b, C are true only a, d are true All are true Answer :2