A particle slides down on a smooth incline of inclination 300, fixed in an elevator going up with an acceleration of 2 m/s2. The box of incline has a length of 4 m. The time taken by the particle to reach the bottom will be: ![]()
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A block of mass 10 kg is in contact with the inner wall of a hollow cylindrical drum of radius 1 m. The coefficient of friction between the block and the inner wall of the cylinder is 0.1. The minimum angular velocity needed for the cylinder, which is vertical and rotating about its axis, will be: |
10 π rad/s
√10 π rad/s
102π rad/s
10 rad/s
A mass m1, placed on top of a trolley of mass m3, is connected to another mass m2 by means of string passing over a smooth pulley as shown in figure. The friction between surfaces is negligible. For m1 ans m2 not to move with respect to trolley, the horizontal force F to be applied on trolley is |
F=m3g
F=(m1 + m2)g
F=(m1+m2+m3)m2gm1
F= m1g
A truck is stationary and has a bob suspended by a light string in a frame attached to the truck. The truck suddenly moves to the right with an acceleration of a. In the frame of the truck, the pendulum will tilt: |
to the left and angle of inclination of the pendulum with the vertical is sin-1(ag)
to the left and angle of inclination of the pendulum with the vertical is cos-1(ag)
to the left and angle of inclination of the pendulum with the vertical is tan-1(ag)
to the left and angle of inclination of the pendulum with the vertical is tan-1(ga)
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