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A spring causes a textbook attached to its end to oscillate back and forth. The end of the springs position at time t is defined by the function y = 4.50cos(2.50π t+ 0.500π) meters. The textbook has a weight of 27.5 N. (a) What is the magnitude of the maximum acceleration of the textbook? (b) What is the magnitude of the maximum force the spring exerts on the textbook? (c) State two positions where the force equals zero.
in a materials testing laboratory a metal wire made from a new alloy is found to break when a tensile force of 90.8 n
After hitting the wall, the ball is moving to the left at -28 i m/s. If the collision lasts .15s, what was the horizontal force exerted by the wall on the ball during impact
A 12.0-? resistor, a 12.0-µF capacitor, and a 17.0-mH inductor are connected in series with a 150-V generator, What is the maximum value of the rms current
Charged Metal Sphere A charged metal sphere ofradius 11 cm has a net charge of2.0 10-8 C. What is the electric field at the sphere'ssurface? what is the electric potentialat the sphere's surface?
A machine shop grinding wheel accelerates from rest with a constant angular acceleration of 2.8rad/s2 for 7.6s, Find the total number of revolutions turned
A scaffold of mass 57 kg and length 6.5 m is supported in a horizontal position by a vertical cable at each end. What is the tension in the cable closer to the painter
A projectile is fired at v0 = 394.0 m/s at an angle of ? = 63.6o with respect to the horizontal. How far will the projectile travel in the horizontal direction
A capacitor initially with a voltage of 10v is connected to a voltmeter of internal resistance of 2 Mega Ohms . After a time of 4 sec the voltmeter reads 5.0 volts.
A 350kg piano slides 3.7m down a 33^\circ incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (see the figure(Figure 1) ). The effective coefficient of kinetic friction is 0.32.
A 50.0-Ω resistor is connected to a 30.0-μFcapacitor and to a 60.0-Hz, 100-V (rms) source. Find the power factor and the average power delivered to the circuit
A capacitor consisting of two concentric spheresof radius R1 and R2 =3.50·R1 has a capacitance of C = 5.00 pico Faradsand is charged to a potential difference of 86.0 Volts. Calculate the energy stored in the capacitor
During a fun run a girl runs for 12 s moving 2.7 m/s. She then accelerates at 0.5 m/s^2 over the next 25 m. she then runs at her new speed for 10s. What distance did she cover during the entire period?
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