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It takes an elevator 2.4 min to raise a vehicle with a mass of 410 kilogram from the floor to a height of 6 meters. Find what size motor does it take to do the job?
a 50 kg toy airplane is suspended from the ceiling by a 1.6m cord and rotates in a horizontal circle. If the cord makes an angle of 35 degrees with the vertical, A) Find the speed of the plane B) Find the tension in the cord
A helicopter flies at a constant altitude towing a mass M of 119 kg. The helicopter and the mass have a horizontal acceleration of 2.54 m/s^2. Ignore air resistance find the tension in the cable.
A hollow spherical shell with mass 1.65 rolls without slipping down a slope that makes an angle of 40.0 with the horizontal. Find the magnitude of the acceleration of the center of mass of the spherical shell
A lamp (R = 146 omegacap.gif), an electric heater (R = 25 omegacap.gif), and a fan (R = 51 omegacap.gif) are connected in parallel across a 115 V line. What power is expended in the heater
a 0.10 g honeybee acquires a charge of 23 pc while flying.a. the electric field near the surface of the earth is
A 35 g ice cube at 0.0°C is added to 110 g of water in a 62 g iron cup. The cup and the water have an initial temperature of 26°C. Discover the equilibrium temperature of the cup and its contents.
A 3.5 kg block is released from a compressed spring whose spring constant is 640N/m. After leaving the spring at the spring’s relaxed length, the block travels over a horizontal surface by a coefficient of friction of 0.25, for distance of 7.8mcoming..
Unpolarized light is incident on a linearly polarizing filter oriented 30 degrees with respect to the horizontal. find the final intensity that emerges from the last polarizing filter
A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 3.8 s later. If the speed of sound is 340 m/s, how high is the cliff? Give answer in meters.
two tiny conducting spheres are identical and carry charges of -20.2c and 54.8c. they are separated by a distance of
Two forces act on an object. A 36-N force acts at 225o. A 48-N force acts at 315o. What would be the magnitude and direction of their equilibrant, What is the acceleration of the spider
Two particles of masses m and 3.00m are moving toward each other along the x-axis with the same speed v. They undergo a head on elastic collision and rebound along the x- axis. Find out the final speed of the heavier object.
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