**1291. If we move from equator to pole, value of g :**

**A. Increases ***

B. Decreases

C. Remains same

D. Both A and B

**1292. If the speed of an object is tripled, its kinetic energy is :**

A. 1/9 times

B. 1/3 times

C. 3 times

**D. 9 times ***

**1293. What is the power required to give a body of mass m a forward acceleration a when it is moving with velocity v up a frictionless track inclined at an angle 0 to the horizontal ?**

A. mavg sin 0

**B. mav + mgv sin 0 ***

C. mav sin 0 + mgv

D. (mav + mgv) sin )

**1294. An electric motor is required to haul a cage of mass 400 kg up a mineshaft through a vertical height of 1200 m in 2 minutes .If the overall efficiency is 80%, how much electricity will be required?**

A. 3.2 KW

B. 5.1 KW

C. 32 KW

**D. 50 kW ***

**1295. A 2 kg body and a 3 kg body have equal momentum . If the kinetic energy of 3 kg body is 10j, the KE of 2 kg body will be :**

A. 6.66 J

**B. 15.0 J ***

C. 22.5 J

D. 45.0 J

**1296. A car of mass m has an engine , which can deliver power p. How much time must pass before the vehicle can accelerate from rest to speed v?**

A. .mv/p

B. P/mv

**C. .mv2/2P ***

D. 2p/mv2

**1297. Angle subtended at the centre of the circle by a body is called :**

A. Angular velocity

B. Linear velocity

**C. Angular displacement ***

D. Linear displacement

**1298. When a body moves in a circle in the clockwise direction, the angular displacement A0 is taken as :**

A. Positive

**B. Negative ***

C. Neutral

D. Absolute

**1299. The torque on a body will be zero if the angle between r and is :**

A. 90 Degree

**B. 180 Degree ***

C. 270 Degree

D. 45 Degree

**1300. The direction of angular displacement is determined by using :**

A. Heat to tail rule

B. Fleming left hand rule

**C. Right angle rule ***

D. None of these