A2 kg block is on a horizontal surface. a horizontal force is applied by a person to the block to pull it on the surface with an acceleration of 2 m/s. the coefficient of kinetic friction between the box and the surface is 0.3. how much work is done in joules by the person on the block if the block is pulled 50 m? a) 200 joules b) 250 joules c) o joules d) 300 joules e) 500 joules
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Physics, 21.06.2019 18:00
Awind turbine is initially spinning at a constant angular speed. as the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.173 rad/s2. after making 2870 revolutions, its angular speed is 132 rad/s. (a) what is the initial angular velocity of the turbine? (b) how much time elapses while the turbine is speeding up?
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A2 kg block is on a horizontal surface. a horizontal force is applied by a person to the block to pu...
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