If the angular distance, 0 = 2t3 – 3t2, the angular acceleration at t = 1 sec. is__________________?

Related Mcqs:

1. The total kinetic energy of a hoop of mass 2 kg and radius 4 m sliding with linear velocity 8 m/sec and angular velocity 5 radian/sec is_________________?

   A. 64 J B. 400 J C. 464 J D. 89 J...

2. A circular disc rotates at n rpm. The angular velocity of a circular ring of same mass and radius as the disc and to have the same angular momentum is___________________?

   A. n rpm B. n/2 rpm C. n/4 rpm D. 2n rpm...

3. If a flywheel increases its speed from 10 rpm to 20 rpm in 10 seconds, then its angular acceleration is_____________________?

   A. —rad/sec 10 B. —rad/sec 20 C. —rad/sec 30 D. none of the above...

4. A symmetrical body is rotating about its axis of symmetry, its moment of inertia about the axis of rotation being 2 kg -m2 and its rate of rotation 2 revolutions/see. The angular momentum of the body in kg-m2/sec is_____________________?

   A. 4 B. 6 7i C. 8TC D. 8...

5. Two balls of masses 3 kg and 6 kg are moving with velocities of 4 m/sec and 1 m/sec respectively, towards each other along the line of their centers. After impact the 3 kg ball comes to rest. This can happen only if the coefficient of restitution between the balls is____________________?

   A. 2/3 B. 1/5 C. 3/5 D. 1/3...

6. A shell travelling with a horizontal velocity of 100 m/sec explodes and splits into two parts, one of mass 10 kg and the other of 15 kg. The 15 kg mass drops vertically downward with initial velocity of 100 m/sec and the 10 kg mass begins to travel at an angle to the horizontal of tan”1 x, where x is______________________?

   A. 3/4 B. 4/5 C. 5/3 D. 3/5...

7. A flywheel of moment of inertia 20 kg-m” is acted upon by a tangential force of 5 N at 2 m from its axis, for 3 seconds. The increase in angular velocity in radian persecond is__________________?

   A. 1/2 B. 3/2 C. 2 D. 3...

8. The maximum value of the horizontal range for a projectile projected with a velocity of 98 m/sec is__________________?

   A. 98 m B. 490 m C. 980 m D. 1960 m...

9. The angular speed of a car while taking a circular turn of radius 100m at 36 km/hour, is_______________?

   A. 0.1 radian/sec B. 1 radian/sec C. 100 radian/sec D. 1000 radian/sec...

10. Instantaneous center is at infinity when the angular velocity is _________________?

    A. constant B. zero C. maximum D. minimum...