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A pendulum of length L with a bob of mass m swings back and forth. At the low point of its motion (point Q), the tension in the string is (3/2)mg. What is the speed of the bob at this point?
A wire of initial length Lo and radius ro has measured resistance of 1.0 ?. The wire is drawn under tensile stress to a new uniform radius of r = 0.25ro. What is the new resistance of the wire
An artificial earth satellite has a circular orbit of radius 5.91 106 m (which means it is orbiting approximately -450 km above the surface of the earth) in an equatorial plane. Find the satellite's instantaneous acceleration at time t. Magnitude? ..
A bunch of cylindrical logs are lying next to the Hudson River. If each log has a diameter of 23cm, a length of 6m, and has a density of 700 kg/m^3 A) how much does 1 log weigh in Newton’s? B) If 6 of them are connected together to form a raft, how m..
Find out the magnitude of the truck's vertical component of displacement, answer in units of meters.
A hand-driven tire pump has a 2.50 cm diameter piston and a maximum stroke of 32.0 cm. How much work do you do in one stroke if the average gauge pressure is 2.40 x 105 N/m2 (about 35 psi)? (You may consider this an isothermal process.)
You come out of the grocery store with a full shopping cart. You stop behind your car to get out your keys, unlock your car, and put your stuff inside. You didn't notice, but the parking lot is sloped at an angle of 3.0 degrees, so as soon as you ..
A ball of mas 0.250. Kg is attached to a string 0.750 m long. The ball is swung in a s pendulum-type motion such that it has a speed of 6.40 m/s, What is the corresponding tension in the string
The outer edge of rotating Frisbee with diameter of 29 centimeter has a linear speed of 3.7 m/s. Compute the angular speed of the Frisbee
The return stroke of a bolt of lightning typically carries a peak current of 24 kAmp up from the ground. Find the maximum magnetic field associated with bolt 1.1 meter away
A woman at an airport is towing her 20.5 kg suitcase at constant speed by pulling on a strap at an angle of ? above the horizontal. What angle does the strap make with the horizontal
Two charged plates create a potential difference of 190 V. At a point halfway between the plates an electron is released from rest. What was the initial speed and direction of the proton
What is the value of h0? If the block were released from height 3h0 above the spring, Evaluate the maximum compression of the spring?
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