A ball is dropped from a height of 16 m on a horizontal floor. If it rebounds to a height of 9 m after striking the floor, the coefficient of restitution between ball and floor is
A). 1/4
B). 2/3
C). 3/4
D). 4/3
Which one of the following statements is true?
A). The tangent of the angle of friction is equal to coefficient of friction
B). The angle of repose is equal to angle of friction
C). The tangent of the angle of repose is equal to coefficient of friction
D). All the above
At the instantaneous center, the velocity of the moving lamina at any instant is
A). Zero
B). Maximum
C). Minimum
D). Varying
The angular speed of a car while taking a circular turn of radius 100 m at 36 km/hour, is
A). 0.1 radian/sec
B). 1 radian/sec
C). 100 radian/sec
D). 1000 radian/sec
A shell of mass 100 kg travelling with a velocity of 10 m/sec breaks into two equal pieces during an explosion which provides an extra kinetic energy of 20000 Joules. If the pieces continue to move in the same direction as before, then the speed of the faster one must be
A). 20 m/sec
B). 30 m/sec
C). 40 m/sec
D). 50 m/sec