Laws of motion
A mass 'm' is supported by a massless string wound around a uniform hollow cylinder of mass m and radius R. If the string does not slip on the cylinder, with what acceleration will the mass fall or release?
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The speed of the stone is increased beyond the maximum permissible value, and the string breaks suddenly, which of the following correctly describes the trajectory of the stone after the string breaks:
A block B is pushed momentarily along a horizontal surface with an initial velocity v . If mu is the coefficient of sliding friction between B and the surface, block B will come to rest after a time:
A person of mass 60kg is inside a lift of mass 940kg and presses the button on control panel. The lift starts moving upword with an acceleration 1.0m/s2 . If g=10m/s2 , the tension in the supporting cable is.
A satellite in a force - free space sweeps stationary interplanetary dust at a rate dM/dt=αv, where M is the mass , vis the velocity of the satellite and α is a constant. What is the deacceleration of the satellite ?
A door knob is an example of screw.
Resolve horezontally and vertically a force F=8N which mokes an angle of 45∘ with the horizontal.
A pebble of mass 0.05kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble,(a) during its upward motion,(b) during its downward motion,(c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45o with the horizontal direction? Ignore air resistance.
Two billiard balls each of mass 0.05kg moving in opposite directions with speed 6ms−1collide and rebound with the same speed. What is the impulse imparted to each ball due to the other?