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A spring with a constant k of 30 N/m is stretched a distance of 20 cm (0.20m) from its original unstretched position. What is the increase in potential energy of the spring?
what is the frequency of vibration of the string. If the shot was launched from 6.00 f above the ground at an initial angle of 42.0 degrees , what was its initial speed.
A 4.20kg steel ball strikes a wall with a speed of 7 m/s at an angle of 60° with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for 0.20 s, what is the average force exerted by the wall on bal..
A force of 323N is applied horizontally to a crate in order to displace crate 30m across a level floor at a constant velocity. As a result of this work.
What magnitude of charge must be given to the drop
A rod supports a 2.35 kg lamp. a) What is the tension in the rod? b) Estimate the components of the force that the bracket exerts on the rod.
A 40 kg child sits 1.3 m away from the center of a merry-go-round. If the merry-go-round is traveling with a radial velocity of .78 rad/s, what is the centripetal force on the child
A container is filled to a depth of 25.0 cm with water. What is the absolute pressure at the bottom of the container
A barge of mass 5.0 104 kg is pulled along the Erie Canal by two mules, How much work is done on the barge by both of these mules together as they pull the barge 150 m along the canal
At t=0, a proton is moving with the speed of 5.5×10^5 m/s at an angle of 30 degrees from the x-axis, as shown in the figure. A magnetic field of magnitude 1.5 T is pointing in the positive y-direction. What would be the y-coordinate of the proton ten..
Determine the magnitude of the emf EMF induced in the loop after exactly time 6.00 s has passed since the circumference of the loop started to reduce.
an inductor that has a resistance of 40 ohm is connected to an ideal battery of 224V. Calculate the inductorace
A circular armature coil is used in a motor with a uniform magnetic field of 2.65 T, If this motor is operating on 120 VRMS now with a load (e.g running a fan) and at the angular frequency ?A, how much current is flowing throught the motor
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