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A 44-N crate is suspended from the left end of a plank. The plank weighs 21 N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.30 m from the left end of the plank. How far to the right of the support is the plank's center of gravity?
Ropes utilized in rock climbing are "springy" so they cushion a climber's fall. A particular rope has a force law given by F=-kx +bx^2, where k=223 N/m, b=4.1 N/m^2 and x is the amount of stretch? Discover the potential energy stored in this rope whe..
A bullet is fired from a gun whose barrel is 0.600 m long. The bullets mass is 5.00 g and its velocity is 300m/s when it leaves the gun's muzzle. what was the average force acting on the bullet
A car is driving directly north on the freeway at a speed of 106 km/h and a truck is leaving the freeway driving 91 km/h in a direction that is 40° west of north. What is the velocity of the truck relative to the car
Point charges of 21.0 uC and 42.0 uC are placed 0.500 m apart. At what point along the line connecting them
When a 420 gram mass is attached to a spring, it oscillates with a period of 0.350 s. Find the force constant of the spring
A 5000 Ω resistor and a 50 μF capacitor are connected in series at t=0 with a 6 Volt battery. Find the maximum charge stored on the capacitor
A beam of protons at an accelerator creates a current of 120 mu/A. If the beam is focused on a target, how many protons strike the target in 30.0 s
The earliest capacitors, called "Leyden jars" were made by wrapping conducting metal foil inside and outside glass jars. how tall would the jar have to be to reach a capacitance of 21.0 nF
Nitrogen in a horizontal piston-cylinder assembly expands from an initial volume of 0.10 m3 to a final volume of 0.5 m3 as the gas is heated for 5 minutes by an electrical resistance heater consuming 1 kW of electric power
a speedboat starts from rest and accelerates at 2.01 ms2 for 7.00 s. at the end of this time the boat continues for an
The Hubble Space Telescope orbits the Earth at an altitude of approximately 612 km. Its mass is 11,100 kg, What is the Hubble's total energy
A block of mass 2.50 kg is pushed 3.00 m along a frictionless horizontal table by a constant 10.0 N force directed 25.0° below the horizontal. Determine the work done by the normal force exerted by the table
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