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Sand from a stationary hopper falls onto a moving conveyor belt at the rate of dm/dt = 5 kg/s as shown. The conveyor belt is supported by frictionless rollers and moves at a constant speed of v = 0.75m/s under the action of a constant horizontal external force ~Fext supplied by the motor that drives the belt.
a. Find the sand's rate of change of momentum in the horizontal direction.
b. Find the force of friction exerted by the belt on the sand.
c. Find the power required by ~Fext.
A 3.50-m-long, 360kg steel uniform beam extends horizontally from the point where it has been bolted to the framework of a new building under construction, What is the magnitude of the total torque due to the worker and the force of gravity
An object of mass of 2.0 kg hangs from an ideal massless spring with a spring constant of 50 N/m. What is the amplitude of the resulting oscillations
A school yard teeter-totter with a total length of 5.2m and a mass of 36kg is pivoted at its center. A 19 kg child sits on one end of the teeter-totter.
A coil of inductance 81 mH and unknown resistance and a 0.84 µF capacitor are connected in series with an alternating emf of frequency 875 Hz. what is the resistance of the coil
A radioactive sample produces 5120 decays at one point in an experiment and 40.96 minutes later produces 320 decays per minute. What is the half life
A horizontal force a of magnitude 22 N is applied to a 3.25 kg psychology book, as book slides a distance d = 0.500 m up a frictionless ramp.
(8c1p14) Time standards are now based on atomic clocks. A promising second standard is based on pulsars, which are rotating neutron stars, What is the mass of gasoline (? = 0.680 g/cm3) in a 94.6 L gasoline tank? (kg)
What angular resolution would you need to see the Sun and Jupiter as distinct points of light if you were looking at it from 15 light years away
A heat engine operates as a reversible Carnot cycle transfers 6.0 kW of heat from a reservoir at 1000 K, Calculate the power output of this engine
Identify how the carbon sequestration strategy seeks to fix, or at a minimum, define what is meant by the term carbon sequestration
A hydraulic jack is made with a small piston 1.1 cm in diameter that is used to move a large piston 5.3 cm in diameter. how heavy a load can he lift with the jack
A wire 6.10m long with diameter of 2.00mm has a resistance of 0.0280?. Find the resistivity of the material of the wire
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