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A block weighing 80N rests on a plane inclined at 30o to the horizontal. The coefficients of static and kinetic friction are 0.2 and 0.1 respectively what is the minimum magnitude of the force F parallel to the plane that will prevent the block from slipping.
A block of mass m = 5.0 kg is pulled along a rough horizontal surface by a rope as sketched in the figure below. The tension in the rope is 80 N, Find the work done by friction on the block
Astrophysicists in the 1960s tried to explain the existence and the structure of pulsars - extremely regular astronomical sources of radio pulses whose periods ranged from seconds to milliseconds. Estimate the rotation rate of the Sun
The 20-cm-long wrench in the figure swings on its hook with a period of 0.80s, What is the moment of inertia about the hook
A student (m = 58 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.04 s. From what height did the student fall
At the instant she contacts the water, her speed is 9.30 m/s, and her body is extended at an angle of 72.0° with respect to the horizontal surface of the water. Determine her initial velocity, both magnitude and direction
If your boat weighs 1200N, how much water will it displace when it is floating motionless at the surface of a lake
A flywheel with a very low friction bearing takes 1.6 h to stop after the motor power is turned off. The flywheel was originally rotating at 41 rpm. What was the initial rotation rate in radians per second
Think about a communications satellite in geosynchronous orbit. It sits approximately 35,786 kilo meter above the Earth's equator.
A 1.0 kg stone is being whirles at constant speed of 12 m/s in a circle, held on a frictionless surface by a steel wire which is horizontal. The wire is 4.0 m long and its radius is 1.0 mm. Find out the strain in the wire.
A large capacitance of 1.20 mF is needed for a certain application. Find the maximum charge that can be stored
A polypropylene (pp) utility cart is absorbing RF radiation from a wifi laptop sitting on a metal stand over the cart. The polypropylene (pp) utility cart is now warm around its perimeter
A doubly charged ion is accelerated to an energy of 30.0 keV by the electric field between two parallel conducting plates separated by 1.60 cm
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