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A 25-kg mass is supported by ropes as shown. Draw a free-body diagram of the "knot" where the ropes join. Use this to determine the tension in each of the ropes.
With what speed in miles/hr (1 m/s = 2.23 mi/hr) must an object be thrown to reach a height of 91.5 m (equivalent to one football field)? Assume negligible air resistance.
Sean climbs a tower that is 84.7 m high to make a jump with a parachute. what is the potential energy of Sean
An air track glider, 8.00 cm long, blocks light as it goes through a photocell gate. What is the acceleration (assumed constant) of the glider along the track
Two events occur in an inertial system K as follows: Event 1: x1 = a t1 = 2a/c y1 = 0 z1 = 0 Event 2: x2 = 2a t2 = 3a/2c y2 = 0 z2 = 0 In what frame K’ will these events appear to be simultaneous? Is there a frame K’ in which the two events described..
A proton travels with a speed of 4.90 106 m/s at an angle of 55° with the direction of a magnetic field of magnitude 0.190 T in the positive x-direction. What is the magnitude of the magnetic force on the proton
A thin, hollow 60.0 g section of pipe of radius 15.0 cm starts rolling (from rest) down a 18.5° incline 5.40 m long. What will be its total kinetic energy at the base of the incline
a helium nucleus has radius rhe 1.9 fm mass m 6.6 times 10-27 kg and charge 2e. a gold nucleus has charge 87e and
A runner of mass m = 37 kg and running at 2.8 m/s runs asshown and jumps on the rim of a playground merry-go-round which hasa moment of inertia of 383 kg·m2, what is its final angular velocity
A 12-lb sledge hammer head falls a distance of 3-m hitting a0.30-g lead nail initially at a temperature of 22 degreesCelsius. what was the speed of the sledge hammer head just beforehitting the nail
A .250kg ball is thrown horizontally at 16.8m/s Find its change in the magnitude of the momentum
A singly charged ion of mass m is accelerated from rest by a potential difference ?V. What is the ratio of the masses of the ions
a sphere with a 2.25 meter radius and a mass of 3.5 kilogram rolls down the inclined plane shown. at the bottom of the
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