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A 4.3-kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 2.9 m/s2, find the force exerted by the rope on the bucket?
A nonreflective coating (n = 1.31) covers the glass (n = 1.52) of a camera lens. determine the minimum nonzero thickness that the coating can have
The front 1.20 m of a 1600 kg car is designed as a "crumple zone " that collapses to absorb the shock of a collision. what is the magnitude of the average force on the car
A worker pushed a 22 kg block 8.1 m along a level floor at constant speed with a force directed 39° below the horizontal. find the increase in thermal energy of the block-floor system
What should the charge (sign and magnitude) of a particle of mass 1.47 be for it to remain stationary when placed in a downward-directed electric field of magnitude 610.
A 790-kg object and an 889-kg object are separated by 11.0 m. At what position (from the less massive object) can the 260-kg object be placed so as to experience a net force of 10 N towards the less massive object.
To measure her speed, a skydiver carries a buzzer emitting a steady tone at 2500 Hz. Assume the air is calm and the speed of sound is independent of altitude. what beat frequency does she hear
A 6 kg block slides along a frictionless horizontal surface. The block is acted on by two forces, a 4.5 N force to the left, and a 7.5 N force to the right. At what rate is the 4.5 N force doing work on the block at the instant when its speed is 4..
Four identical metallic objects carry the following charges: +6.2 µC, +8.6 µC, -1.0 µC, and -2.0 µC. What is the final charge on each object
A 220 ohm resistor, 0.400 H inductor, 6.00 microF capacitor, and voltage source of amplitude 30.0 V and angular frequency 230 rad/s are connected to form an L-R-C series circuit. What is the current amplitude
The output voltage of an AC source is given by ?v = 120 sin 26.0pt, where ?v is in volts and t is in seconds. Find the frequency of the source
q1. an object 0.600 cm tall is placed 16.5 cm to the left of the vertex of a concave spherical curvature of 22.0 cm.a.
if you are in a roller coaster, which is moving with 10m/s, describing a circular arc with the radius of 10m, what is the force pushing you in the chair at the top of the loop
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