Calculate the centripetal force (in N) on the end of a 41 m (radius) wind turbine blade that is rotating at 0.4 rev/s. Assume the mass is 3 kg.
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- (a) A 15.0 kg child is riding a playground merry-go-round that is rotating at 35.0 rev/min. What centripetal force (in N) must she exert to stay on if she is 3.00 m from its center? (Enter a number.) N (b) What centripetal force (in N) does she need to stay on an amusement park merry-go-round that rotates at 3.00 rev/min if she is 6.00 m from its center? (Enter a number.) N (c) Compare each force with her weight. (For each answer, enter a number.) (force from (a))/(weight) = (force from (b))/(weight)A flywheel in the form of a uniformly thick disk of radius 1.63 m has a mass of 37.1 kg and spins counterclockwise at 463 rpm. Calculate the constant torque required to stop it in 3.00 min.(a) A 23.0 kg child is riding a playground merry-go-round that is rotating at 30.0 rev/min. What centripetal force (in N) must she exert to stay on if she is 1.50 m from its center? (Enter a number.) N (b) What centripetal force (in N) does she need to stay on an amusement park merry-go-round that rotates at 3.00 rev/min if she is 8.00 m from its center? (Enter a number.) N (c) Compare each force with her weight. (For each answer, enter a number.) (force from (a))/(weight) = (force from (b))/(weight)
- A flywheel is turning at a speed of 466 rev/min. Find the tangential speed of a point 35.8 cm away from the center. Round your answer to 2 decimal places.A 15.0 kg child is riding a playground merry-go-round that is rotating at 50.0 rev/min. What centripetal force (in N) must she exert to stay on if she is 1.50 m from its center? N (b) What centripetal force (in N) does she need to stay on an amusement park merry-go-round that rotates at 3.00 rev/min if she is 7.00 m from its center? N (c) Compare each force with her weight. force from (a) weight = force from (b) weight =You have a grindstone (a disk) that is 77.0 kg, has a 0.400-m radius, and is turning at 89.0 rpm, and you press a steel axe against it with a radial force of 16.0 N. (a)Assuming the kinetic coefficient of friction between steel and stone is 0.50, calculate the angular acceleration (in rad/s2) of the grindstone. (Indicate the direction with the sign of your answer.) rad/s2 (b)How many turns (in rev) will the stone make before coming to rest? rev
- (a) A 19.0 kg child is riding a playground merry-go-round that is rotating at 45.0 rev/min. What centripetal force (in N) must she exert to stay on if she is 3.00 m from its center? (Enter a number.) (b) What centripetal force (in N) does she need to stay on an amusement park merry-go-round that rotates at 3.00 rev/min if she is 8.00 m from its center? (Enter a number.) (c) Compare each force with her weight. (For each answer, enter a number.) (force from (a))/(weight) (force from (b))/(weight)Astronauts in the International Space Station must work out every day to counteract the effects of weightlessness. Researchers have investigated if riding a stationary bicycle while experiencing artificial gravity from a rotating platform gives any additional cardiovascular benefit. What frequency of rotation, in rpm, is required to give an acceleration of 1.4g to an astronaut’s feet, if her feet are 1.1 m from the platform’s rotational axis?A centrifuge in a medical laboratory rotates at an angular velocity of 3600 rev/min. When switched off, it rotates through 50.0 complete before coming to rest. what was the magnitude of the angular acceleratiom of the centrifuge as it slow down?
- A rock is wedged in the tread of wheel of a car and is 0.114 meters away from the center the axis of rotation). Calculate the tangential speed (in meters/second) of the rock when the wheel is rotating at 6.53 revolutions/second. Express your answer without units and as a positive number with two decimals.A 22.0-kg child is riding a playground merry-go-round that is rotating at 5.24 m/s. What centripetal force is exerted if he is 1.25 m from its centerA mass of 4.90 kg is suspended from a 1.45 m long string. It revolves in a horizontal circle as shown in the figure. The tangential speed of the mass is 3.31 m/s. Calculate the angle between the string and the vertical. Submit Answer Tries 0/15