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Homework Help for Physics
Physics is the study of matter, motion, energy and force. It is a fundamental science that seeks to understand and explain the universe around us and beyond.
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At an airport, luggage is unloaded from a plane into the three carsof a luggage carrier, as the drawing shows. The acceleration of thecarrier is 0.13 m /s2, and friction is negligible. The couplingbars have negligible mass.
(a) By how much would the tension in each of the coupling bars A,B, and C change if 32 kg of luggage were removed from car 3 andplaced in car 1? If the tension changes, specify whether itincreases or decreases. (Specify a decrease in tension with anegative value and an increase in tension with a positive value. Ifthere is no change, enter 0.)
(b) By how much would the tension in each of the coupling bars A,B, and C change if 32 kg of luggage were removed from car 1 andplaced car 2? If the tension changes, specify whether it increasesor decreases. (Specify a decrease in tension with a negative valueand an increase in tension with a positive value. If there is nochange, enter 0.)
A point charge, -3 MuC, is placed in the x,y-plane at the point (0,2m), while a charge, +2 MuC, is placed at (2m,0). a) Find the magnitude and direction of the electric field E (conventional angle) at the origin of the system coordinates. b) What would be the magnitude of the force experienced by a proton at the origin? c) Find the electric potential V at the origin of coordinates.
The spring of a spring gun has force constant k = 400 N/m andnegligible mass. The spring is compressed 6.00cm and a ball withmass 0.0300kg is placed in the horizontal barrel against thecompressed spring. The spring is then released, and the ball ispropelled out the barrel of the gun. The barrel is 6.00cm long, sothe ball leaves the barrel at the same point that it loses contactwith the spring. The gun is held so the barrel is horizontal.
a)Calculate the speed with which the ball leaves the barrel if youcan ignore friction.
b)Calculate the speed of the ball as it leaves the barrel if aconstant resisting force of 6.00N acts on the ball as it movesalong the barrel.
c)For the situation in part B, at what position along the barreldoes the ball have the greatest speed? (In this case, the maximumspeed does not occur at the end of the barrel.)
d)What is that greatest speed?
i think i got all of them except the last one... d)
Hector aims a spit wad at Eugene head. He launches it at 32 degreesand it travels 2.8 meters before it makes contact. Assume Hectorlaunched the wad from the same height as Eugene's head.
What overall velocity did Hecotr give the spitwad?
Cory's head is in th direct path of the spit wad, at a height of1.3m. Does he need to duck? [0.11m -NO]
How do I set these up?
A copper wire (density ? = 8960 kg/m3) of radius 0.449 mm is carrying a current at the Earth's Equator. Assuming that the magnetic field of the Earth has magnitude 0.515 G at the Equator and is parallel to the surface of the Earth and that the current in the wire flows toward the east, what current is required to allow the wire to levitate?
A race car starts from rest on a circular track of radius 595 m.The car's speed increases at the constant rate of 0.480 m/s2. Atthe point where the magnitudes of the centripetal and tangentialaccelerations are equal, find the following.
(a) the speed of the race car
(b) the distance traveled
(c) the elapsed time
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