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An automobile engine slows down from 4500 rpm to 1200 rpm in 2.5 s. Calculate: a) Its angular acceleration, assumed constant.
A wheel 33cm in diameter accelerates uniformly from 240 rpm to 360 rpm in 6.5s. How far will a point on the edge of the wheel have traveled in this time?
A square wire 2.0 cm on each side is oriented so that 5.00 mT magnetic field makes a 30 degree angle with the normal to the plane of the square. if a 1.0 mA current causes a 25 N x m torque on the w
A proton is fired at 7E6 m/s directly towards a stationary 2E-6 C point charge that cannot move and is initially 2 meters away from the proton. What is the smallest distance that ever separates the
A heat engine utilizes a heat source at 580 degrees Celsius and has an ideal (Carnot) efficiency of 28%, to increase the ideal efficiency to 34%, what must be the temperature of the heat source?
A skier of mass 70kg is pulled up a slope by a motor driven cable. How much work is required to pull him 60m up a 30 degrees slope, assuming its frictionless, at a constant speed of 2.0m/s?
How fast can you set the Earth moving? In particular, when you jump straight up as high as you can, what is the maximum recoil speed that you give to the Earth? Let your mass be81.0kg and your maxim
A solid ball encounters a 0.760 m vertical rise on the way back to the ball rack. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. The translational speed of t
The frequency of a light wave is the same when the light travels in two different media. Assuming that the refraction indices of the two media are 1.628 and 1.862, respectively, find the ratio of th
A 1.03 10-3 µF capacitor has an initial charge of 0.100 C. When a resistor is connected across the capacitor plates, there is an initial current through the resistor of 1.08 A. What is the cur
An electron moves through a uniform electric field E = (2.31i + 5.06j) V/m and a uniform magnetic field B = 0.381k T. Determine the x- and y-component of the acceleration of the electron when it has
You are designing a motor cycle. To provide a smooth ride, you want the bike to loose energy it acquires from driving through pot holes as quickly as possible. To this end, you choose shock absorber
The magnetic field produced by the solenoid in a magnetic resonance imaging (MRI) system designed for measurements on whole human bodies has a field strength of 5.04 T, and the current in the soleno
A fire hose ejects a stream of water at an angle of 36.5 degrees above the horizontal. The water leaves the nozzle with a speed of 27.0 m/s. Assuming that the water behaves like a projectile, how fa
An airplane with a speed of 89.1 m/s is climbing upward at an angle of 48.4 ° with respect to the horizontal. When the plane's altitude is 548 m, the pilot releases a package. Relative to the gr
A child loses his balloon, which rises slowly into the sky. If the balloon is 14 cm in diameter when the child loses it, what is its diameter at the following altitudes? Assume that the balloon is v
When a 2.50 kg object is hung vertically on a certain light spring described by hooke's law, the spring stretches 2.76 cm. What's the force constant of the spring?
A large cruise ship of mass 6.50 * 10^7 kg has a speed of 12.0 m/s at some instant. What is the magnitude of the constant force required to stop it as it undergoes a displacement of 2.50 km?
A proton has a velocity of 1.25 x 10^6 m/s. It travels into a magnetic field that has a strength of 1.5 T. What is the maximum force that the proton can experience?
A much smaller asteroid, of mass 930 kg, is in a circular orbit about the first at a distance of 256 meters as a result of their mutual gravitational attraction. What is the speed of the second aste
What is the average power of the flywheel during this interval . First find the torque, and alpha.
What is the energy dissipated as heat by the resistor as the capacitor is charging?
An electric car is designed to run off a bank of 12-V batteries with total energy storage of 3.0 × 107 J. If the electric motor draws 6000 W in moving the car at a steady speed of 10 m/s, how f
If an AC voltage of 120 V is across the primary coil, what will be the voltage on the secondary coil?
A parallel-plate capacitor has 1.85 cm2 plates that are separated by 5.72 mm with air between them. If a 12.0 V battery is connected to this capacitor, how much energy does it store?