151. If the gravitational acceleration at any place is doubled, then the weight of a body will be
152. The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is
153. The resultant of two forces P and Q (such that P > Q) acting along the same straight line, but in opposite direction, is given by
154. The velocity ratio for the second system of pulleys is n.
155. The law of motion involved in the recoil of gun is
156. When a particle moves along a circular path, its acceleration has two components, one is normal component and the other is tangential component of acceleration.
157. A machine which is not capable of doing any work in the reversed direction, after the effort is removed, is called a reversible machine.
158. The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is
159. When two elastic bodies collide with each other,
160. The centre of gravity of a triangle lies at a point where its medians intersect each other.
161. In order to double the period of simple pendulum, the length of the string should be
162. The moment of inertia of a square of side a about its base is a4/ 3.
163. If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys
164. The centre of gravity of a right angled triangle lies at its geometrical centre.
165. Vectors method for the resultant force is also called polygon law of forces.
166. Two equal and opposite parallel forces whose lines of action are different form a couple.
167. When a person, on a bicycle, drives round a curve, he has to lean __________ to maintain equilibrium.
168. A circular hole of 50 mm diameter is cut out from a circular disc of 100 mm diameter as shown in the below figure. The centre of gravity of the section will lie
169. The maximum velocity of a particle moving with simple harmonic motion is
170. The loss of kinetic energy due to direct impact of two bodies __________ upon the value of coefficient of restitution.
171. A body of mass m moving with a constant velocity v strikes another body of same mass m moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is
172. The Cholas maintained close political, and matrimonial relations with?
173. The unit of power in S.I. units is
174. According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)
175. The resultant of two equal forces P making an angle θ, is given by