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Coulomb's Law gives us an expression for the electric field caused by a point charge with magnitude . Suppose we have several point charges. The electric field at a location is the vector sum of point charge contributions. Consider a standard x-y coordinate system. A small ball with charge -4.5 nC is located on the x axis at x1 = 6.5 cm. A second ball of charge -8.4 nC is located at x2 = -3.0 cm and y2 = 4.0 cm. (a) Find the components of the net electric field at the origin. Ex = , Ey = (b) Find the magnitude and direction of the net electric field at the origin. |E| = at direction (from +x axis).
A force acts on a block weighing 45N. The block is initially at rest on a plane inclined at angle θ = 18.0° to the horizontal. The positive direction of x axis is up the plane.
100 g ball of clay is thrown horizontally with a speed of 13m/s toward a 900g block resting on a frictionless surface. It hits the block and sticks. The clay exerts a constant force on the block during the 7 ms it takes the clay to come to rest re..
What are the direction and magnitude of the magnetic force the field exerts on the proton.
A brick is thrown vertically upward with an initial speed of 4.90 m/s from the roof of a building. If the building is 98 m tall, how much time passes before brick lands on the ground.
A 10 m beam of mass 330 kg extends over a ledge. The beam is not attached, but simply rests on surface. A 53 kg student intends to position the beam so that he can walk to the end of it. How far from the edge of the ledge can the beam extend.
If an astronaut can throw a certain wrench 14 {rm m} vertically upward on earth, how high could he throw it on our moon if he gives it the similar starting speed in both places.
An automobile tire has a radius of 0.330 m, and its centre moves forward with a linear speed of v= 15.0 m/s. Find the angular speed of the wheel.
A new circus act is called the Texas Tumblers. Lovely Mary Belle swings from a trapeze, projects herself at an angle of 53, and is supposed to be caught by Joe Bob, whose hands are 6.10 above and 8.02 horizontally from her launch point. You can ignor..
A sled starts up an incline of 350 with the horizontal. The sled starts from the bottom with an initial velocity of 5 m/s. (a) How far u p the incline does it go? A second sled starts to slide from the top when the first sled starts to slide down...
Two charged pith balls are suspended on very light 10.7 cm strings. Each has a mass 11.0 g. In stability, the total angle between the strings is 37 degrees. Draw the free body diagram for one of the pith balls and clearly label all forces with magnit..
What is the friction force that acts on the firefighter. find Max wavelength and Min wavelength.
The end point of a spring vibrates with a period of 1.9 seconds when a mass m is attached to it. When this mass is increased by 9.630×101 kg, the period is found to be 4.1 seconds. Find the value of m.
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