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A 70.0 kg girl lowers herself to the ground from a height of 8.8 m by holding onto a rope running over a pulley to a 54.0 kg sandbag. What is the magnitude of the acceleration of the girl?
if the girl starts from rest, what is her speed when she reaches the ground?
A -6.00 µC charge is moving with a speed of 8.20 104 m/s parallel to a very long, straight wire, Find the magnitude and direction of the force on the charge.
What is the net electric flux through the spherical surface
A fresh pumpkin has a mass of 2.44 kg is droped from above the ground. Ignore air friction. Calculate the momentum change of the pumpkin
During a 80-ms interval, a change in the current in a primary coil occurs. This change leads to the appearance of a 6.1-mA current in a nearby secondary coil. The secondary coil is part of a circuit in which the resistance is 12 Î
A parallel-plate capacitor with circular plates of radius R is being charged. What is the radius R for the circular plate
How many revolutions per minute would a 29 {rm m}-diameter Ferris wheel require to make for the passengers to feel "weightless" at topmost point.
A particle in the solar system is under the combined influence of the Sun's gravitational attraction and the radiation force due to the Sun's rays, Calculate this critical radius
A battery has an emf and an internal resistance . When the battery is connected to a 25 ohm resistor, the current through the battery is 0.65 A. Find the battery's internal resistance
Explain why do we place guards over capacitors and where does the guard voltage come into play when using an analogue L-C meter to probe the capacitance?
two uniformly charged insulating rods are bent in a semi circle shape with radius R=12cm. find direction of the elctric field at the center of the circle
On a banked race track, the smallest circular path on which cars can move has a radius of 120 m, while the largest has a radius 155 m, Find the smallest speed at which cars can move on this track without relying on friction
A ladder (L = 7.60 m) of weight WL = 360 N leans against a smooth vertical wall. What is the minimum value for the coefficient of static friction between the ladder and the ground
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