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Consider an equilibrium situation in which three forces act on an object but the total force is zero. What can be said about these forces? Pick all that apply. 1. All forces must have the same magnitude. 2. All forces must have different magnitude. 3. The sum of the magnitudes of any two forces must be greater than the magnitude of the third force. 4. The magnitude of any force must be greater than the difference of magnitudes of the other two forces. 5. The graphical vector sum resembles a triangle. 6. All forces must lie in the same plane.
a stone is projected at a cliff of height h with an initial speed of 44.0 m/s directed at an angle ?0 = 51.0° above the horizontal. find the speed of the stone just before impact
An electron is accelerated from rest by a potential difference of 440 V. Calculate the radius of its path in the magnetic field
A see-saw board is supported at its center by a fulcrum A 25 kg person sits 80 cm from center. How much force does the fulcrum exert on board
1. How much more light does one collect with a 4-meter diameter telescope in 0.5 minutes than with a 0.5-meter diameter telescope in 4 minutes?
At 20.0°C, a mainly silicon resistor has a resistance of 275 ?, and a tungsten resistor has a resistance of 752 ?. At what temperature will their resistances be equal
A 130g block slides back and forth on a frictionless surface between two springs, Find the maximum compression of the right-hand spring
State clearly the difference (a) between electric potential and electric field, (b) between electric potential and electric potential energy.
The speed of the tip of the minute hand on a town clock is 0.00125 m/s. find the centripetal acceleration of the tip of the second hand
The Hall effect can be used to determine the density of mobile electrons in a conductor. Find the density of mobile electrons in the material
An air-track glider attached to a spring oscillates between the 12.0 cm mark and the 58.0 cm mark on the track. The glider completes 15.0 oscillations in 32.0 s. What are the (a) period, (b) frequency, (c) amplitude, and (d) maximum speed of the ..
A force F is applied horizontally to a block of mass 2 kg which, nevertheless, slides down a frictionless 5-m plane inclined at 25 degrees to the horizontal. what is its acceleration down the plane
A 2.6-kg cart is rolling along a frictionless, horizontal track towards a 1.7-kg cart that is held initially at rest. What is the total momentum of the system of the two carts
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