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Two point charges are located on the -axis of a coordinate system: q1 = 1.0 nC is at x = +2.0 cm, and q2 is at x = +4.0 cm. What is the total electric force exerted by q1 and q2 on a charge q3 = 5.0 nC at x = 0?
Lightning occurs when there is a flow of electric charge (principally electrons) between the
ground and a thundercloud. The maximum rate of charge flow in a lightning bolt is about 20,000 C/s this lasts for 100 μs or less. How much charge flows between the ground and the cloud in this time? How many electrons flow during this time?
A small charge (q= 6.0 mC) is found in a uniform E-field (E= 2.9 N/C). determine the force on the charge.
Find the electric field acting on a 2.0 C charge of an electrostatic force of 10,500 N acts on the particle.
A small charge (q= 6.0 mC) is found in a uniform E-field (E= 2.9 N/C). determine the force on the charge.
Two-point charges are arranged on the x-y coordinate system as follows: q1= 4x10^-8 C at (0,3 m) and q2= -9x10^-7 C at (5,0 m). Find the electric origin at (0,0). Using the Pythagorean theorem calculate for the magnitude E of the resultant electric field.
A conducting sphere of raduis 8.0cm carries o uniform volume charge density of 500 NC/m3. What is the electric field in N/C at r= 3.0cm?
What is the total electric flux through a closed surface containing a 2.0 μC charge?
A particle of mass 3 Kg falls from rest at a point 5 m above the surface of a liquid which is in a container. There is no instantaneous change in speed of the particle as it enters the liquid. The depth of the liquid in the container is 4 m. The downward acceleration of the particle while it moving in the liquid is 5.5 m/s^2. (i) Find the resistance to motion of the particle while it is moving in the liquid. (ii) Sketch the velocity- time graph for the motion of the particle, from the time it starts to move until the time it reaches the bottom of the container. Show on your sketch the velocity and the time when the particle enters the liquid, and when the particle reaches the bottom of the container.
A car of mass 350 Kg is travelling at 30 m/s when it starts to slow down, 100 m from a junction. At first, it slows just using the air resistance of 200 N then, at a distance of s m from the junction, it slows using brakes, providing a force of 2000 N as well as the air resistance. Find the distance from the junction at which the brakes must be applied if the car is to stop at the junction.
