23 A force is applied to a doorknob. This force will be most effective in follow

Question

23 A force is applied to a doorknob. This force will be most effective in following is true? of the force is at an angle of 0° with respect to the door in causing the door to direction of the force is at an angle of 90s with respect to the door C. The direction of the force is at an angle of 45° with respect to the door Answer: Q24 A ball of m passes through a hole in the center of the table. If the string is pulled down, thereby reduc of the ball, the angular velocity of the ball is observed to increase. Complete the following because a. the total mechanical energy of the ball must remain constant. b. the angular momentum of the ball is conserved. c. the linear momentum of the ball is conserved d. it is required by Newton's first law of motion. Answer 5 Which one of the following expressions allows one to calculate the angu d axis? (1/2)lw2 (1/2)MRv

Explanation / Answer

Q.23.  Force will be most effective when torque will be Maximum and for that angle should be 90°.

Option (b) is correct.

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