1. The horizontal range of a projectile fired at an angle of 15^o is 50 m. If it is fired with the same speed at an angle of 45^o, its range will be

2. Consider the quantities pressure, power, energy, impulse gravitational potential, electric charge, temperature, area. Out of these, the only vector quantities are

3. The component of a vector r along X-axis will have maximum value if

4. The angular velocity depends upon the rate of change of the?

5. The path of a particle is given by the expression y = at + bt², where a and b are constants . Y is the displacement at time t. Its velocity at any instant is given by

6. The resultant of two forces P and Q is R. If one of the forces is reversed in direction, then the resultant becomes S. Then for the identity R² + S² = 2(P² + Q²) to hold good

7. A body travels along the circumference of a circle of radius 2 m with a linear velocity of 6 m/s . Then its angular velocity is

8. A body is moving along a circle with an increasing speed. It possesses?

9. In a two dimensional motion, instantaneous speed v0 is a positive constant. Then which of the following are necessarily true?

10. What is the minimum number of unequal forces whose resultant will be zero?

11. The word centripetal is derived from two Greek words meaning?

12. Which one of the following statements is true?

13. Three vectors A, B and C satisfy the relation A.B = 0 and A.C = 0. The vector A is parallel to

14. The muzzle speed of a certain rifle is 330 ms^-1. At the end of one second, a bullet fired straight up into the air will travel a distance of:

15. The total flight requires a time that is?

16. A bus is moving on a straight road towards north with a uniform speed of 50 kmh^-1 when it turns left through 90°. If the speed remains unchanged after turning, the increase in the velocity of the bus in the turning process is :

17. Two bullets are fired simultaneously horizontally and with different speeds from the same place. Which bullet will hit the ground first?

18. A body travelling in a circular path at uniform speed has :

19. A car sometimes overturns while taking a turn. When it overturns, it is

20. A car is moving with a speed of 30 m/s on a circular path of radius 500 m. Its speed is increasing at the rate of 2 m/s². The acceleration of the car is