A biker applies a constant force of 40 N to pedal a bicycle to keep its wheel rotating at 8 rad/s. What is the power delivered by the biker?
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A biker applies a constant force of 40 N to pedal a bicycle to keep its wheel rotating at 8 rad/s. What is the power delivered by the biker?
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- An engine has torque of 550 n m at 8. rad/s. what power in watts does it develop?A 1 kg phonograph turntable has a diameter of 34 cm. What is its kinetic energy when it rotates at 45 rpm? The correct answer is 0.16 JAn engine produces a net torque of 20 N-m. If it rotates at 110 rpm what is the rotational power of the engine? Choose 102 watts 209 watts 251 watts 230 watts
- A rotating flywheel can be used to store energy. If it is required to store 1.00 × 106J of energy when rotating at, ω, 400 rad/s, what is the moment of inertial of the wheel inkg∙m2?A) 6.25B) 12.5C) 25.0D) 50.0A hollow cylinder (hoop), a solid cylinder (disk), and a solid sphere, each of mass M and radius R, roll down a hill of height h. b. Rank the objects based on their rotational kinetic energy at the bottom of the hill. Rank the one with the most energy 1, etc. If two are equal, give them the same ranking. hoop___________ disk_______________sphere_______________Justify your ranking.A hollow ball rolls along a horizontal surface at 2.5 m/s when it encounters an upward incline. if it rolls without slipping up the incline, what maximum height will it reach?
- The answer is supposed to be v=2.56m/s but I'm not sure how to write out the problem.A circular saw is powered by a motor. When the saw is used to cut wood, the wood exerts a torque of 0.7 N.m on the saw blade. If the blade rotates with a constant angular velocity of 23 rad/s the work done on the blade by the motor in 7.3 min is:The radius of a wheel is 0.890 m. A rope is wound around the outer rim of the wheel. The rope is pulled with a force of magnitude 5.00 N, unwinding the rope and making the wheel spin CCW about its central axis. Ignore the mass of the rope. (a) How much rope unwinds while the wheel makes 1.00 revolution? ___m (b) How much work is done by the rope on the wheel during 1.00 revolution? ___J (c) What is the torque on the wheel about its axis due to the rope? ____N⋅m
- A wheel with rotational inertia 46 kg.m2 is mounted on a fixed, frictionless axle. The angular speed of the wheel is increased from zero to 43 rad/s in 19-s. What is the AVERAGE power input to the wheel during this time interval?The puck in the figure below has a mass of 0.186 kg. Its original distance from the center of rotation is 40.0 cm, and it moves with a speed of 85.0 cm/s. The string is pulled downward 15.0 cm through the hole in the frictionless table. Determine the work done on the puck. Hint: Consider the change in kinetic energy of the puck. Need Help? Read It Watch ItA circular saw is powered by a motor. When the saw is used to cut wood, the wood exerts a torque of 0.8 N.m on the saw blade. If the blade rotates with a constant angular velocity of 19 rad/s the work done on the blade by the motor in 7.6 min is: