Determine the speed of the crate three seconds afterward
At the instant the cable fails, the 180 lb crate is traveling up the plane with a speed of 15 ft/s. Determine the speed of the crate 3s afterward. The coefficient of kinetic friction between the crate and the plane is u= 0.4.
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A spaceship lifts off vertically from a planet where g = 7.0 m/s2. If the ship has an upward acceleration of 1.8 m/s2 as it lifts off, what is the magnitude of the force exerted by the ship on its pilot, who weighs 665 N on Earth?
A farsighted man has a contact lens prescription of +2.8 diopters, enabling him to see items in focus when they are no closer to his eyes than 28 cm. What is his near point when he is not wearing the contact lenses?
The work and the heat per degree change of temperature for a system executing a non-flow process are given by dW/dt= 80 watt-sec/°C and dQ/dt= cal/°C; respectively.
A circular coil of wire carries a current of 22 A. The radius of the loop is 9.0 cm, and the magnitude of the magnetic field at the center of the loop is 6.0 mT (millitesla). How many turns does the coil have?
Determine the speed of the crate 3s afterward. The coefficient of kinetic friction between the crate and the plane is u= 0.4.
A horizontal wire that is 4.4 m long is exposed to a uniform external magnetic field of magnitude 79 mT (millitesla). The external field is directed at an angle of 39o below the horizontal.
Determine the velocity of the cart just after firing. During the firing, the man remains at the same position on the cart. Neglect rolling resistance of the cart.
An RCL series circuit has a 18-ohm resistor, a 0.050-H inductor, and a 1.5x10-4 F capacitor. The generator has an rms voltage of 240 volts. What is the rms current in the circuit when the generator is set to 30.0 Hz?
Determine the speed of the block just after the impact. Also, what distance does slide up the plane before it momentarily stops? The coefficient of kinetic friction between the block and the plane is u=.4.
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