n the figure, a wheel of radius 0.326 m is mounted on a frictionless horizontal axis. The rotational nertia of the wheel about the axis is 0.264 kg.m². A massless cord wrapped around the wheel's circumference is attached to a 4.00 kg box. The system is released from rest.When the box has a kinetic energy of 3.00 J, what are (a) the wheel's otational kinetic energy and (b) the distance the box
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- While spinning down from 500.0 rpm to rest, a solid uniform disk does 51 KJ of work. If the radius of the disk is r=400mm what is it's mass?.Problem 5 : Two masses, mA = 35.0 kg and mB = 39.0 kg , are connected by a rope that hangs over a pulley (as in the figure (Figure 1)). The pulley is a uniform cylinder of radius 0.381 m and mass 3.5 kg . Initially mA is on the ground and mB rests 2.4 m above the ground. Part A If the system is released, use conservation of energy to determine the speed of mB just before it strikes the ground. Assume the pulley bearing is frictionless. Express your answer using two significant figures.You are designing a rotating metal flywheel that will be used to store energy. The flywheel is to be a uniform disk with radius 23.0 cm. Starting from rest at t = 0, the filywheel rotates with constant angular acceleration 3.00 rad/s about an axis perpendicular to the flywheel at its center. Part A If the flywheel has a density (mass per unit volume) of 8600 kg/m3, what thickness must it have to store 800 J of kinetic energy at t = 8.00 s? Express your answer with the appropriate units. ? h = Value Units Submit Request Answer
- Two satellites are in circular orbits around a planet that has radius Rp = 9.00 x 106 m. One satellite has mass m₁ = 68.0 kg, orbital radius r₁ = 5.00 × 107 m, and orbital speed v₁ = 4800 m/s. The second satellite has mass m₂ = 84.0 kg and orbital radius 12 = 3.00 x 107 m. a. Calculate the orbital speed of the second satellite. b. Calculate the total mechanical energy of both satellites.Item 21 Hide Timer 21 You are designing a rotating metal flywheel that will be used to store energy. The flywheel is to be a uniform disk with radius 29.0 cm. Starting from rest at t = 0, the flywheel rotates with constant angular acceleration 3.00 rad/s about an axis perpendicular to the flywheel at its center. Part A If the flywheel has a density (mass per unit volume) of 8600 kg/m', what thickness must it have to store 800 J of kinetic energy at t = 8.00 s? Express your answer with the appropriate units. HA ? h = Value Units Submit Request Answer Provide Feedback Nex DII DD OOD 80 888 F9 F10 esc F7 FB F3 F4 F5 F6 F1 F2 &NE Chapter 10, Problem 062 Z Your answer is partially correct. Try again. In the figure, three 0.07 kg particles have been glued to a rod of length L = 5 cm and negligible mass and can rotate around a perpendicular axis through point O at one end. How much work is required to change the rotational rate (a) from 0 to 20.0 rad/s, (b) from 20.0 rad/s to 40.0 rad/s, and (c) from 40.0 rad/s to 60.0 rad/s? (d) What is the slope of a plot of the assembly's kinetic energy (in joules) versus the square of its rotation rate (in radians-squared per second-squared)? Axis (a) Number Units 0.0010110 (b) Number Units 0.030 (c) NumberTo.050 Units (d) Number UnitšT kg-m 2 m Click if you would like to Show Work for this question: Open Show Work em
- Pls answer with handwritten solutionsA 2.65-kg grinding wheel is in the form of a solid cylinder of radius 0.100 m. Part A What constant torque will bring it from rest to an angular speed of 1200 rev/min in 2.5 s? Express your answer with the appropriate units. Part B Through what angle has it turned during that time? Part c.Use equation W=τz(θ2−θ1)=τzΔθto calculate the work done by the torque. Express your answer with the appropriate units. Part D What is the grinding wheel’s kinetic energy when it is rotating at 1200 rev/min?Express your answer with the appropriate units. Part E Compare your answer in part (D) to the result in part (C). Compare your answer in part (D) to the result in part (C).The results are the same.The results are not the same.A merry-go-round on a playground consists of a horizontal solid disk with a weight of 795 N and a radius of 1.53 m. A child applies a force 50.5 N tangentially to the edge of the disk to start it from rest. What is the kinetic energy of the merry-go-round disk (in J) after 3.05 s? J Submit Answer
- 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 It。 A propeller is modeled as five identical uniform rods extending radially from its axis. The length and mass of each rod are 0.871 m and 2.77 kg, respectively. When the propellor rotates at 529 rpm (revolutions per minute), what is its rotational kinetic energy K? K= 4123.5 IncorrectA bicycle racer is going downhill at 12.9 m/s when, to his horror, one of his 2.27 kg wheels comes off when he is 80.0 m above the foot of the hill. We can model the wheel as a thin-walled cylinder 85.0 cm in diameter and neglect the small mass of the spokes. Part A How fast is the wheel moving when it reaches the foot of the hill if it rolled without slipping all the way down? Η ΑΣΦ V₁ = 28.0 ? m/s Submit Previous Answers Request Answer × Incorrect; Try Again Part B How much total kinetic energy does the wheel have when it reaches the bottom of the hill? ΜΕ ΑΣΦ Ke 1780 Submit Previous Answers Request Answer × Incorrect; Try Again ? J