Physics, 28.07.2021 02:50 SKYBLUE1015
A yoyo is a toy made of three uniform density disks with a string wrapped around the middle disk. The middle disk has a mass and radius ; the outer disks each have mass and radius . The string has negligible mass and stretches a negligible amount. Analyze the following situation. As the yoyo is moving downward, you pull up with a constant force F and as you pull, your hand moves upward a distance . At the beginning of your move the yoyo was headed downward with speed and angular speed . When your hand has moved up a distance , the yoyo has moved down a smaller distance and has speed downward and angular speed . Assume that the string doesn't slip or rub against the outer disks, so there is no change in temperature of the yoyo.
Required:
a. The moment of inertia of the yoyo is the sum of the moments of inertia of the three disks about the axis of rotation. Calculate this quantity.
b. Calculate the speed ð£2.
c. Calculate the angular speed ð2.
Answers: 2
Physics, 21.06.2019 16:40
An airplane flying parallel to the ground undergoes two consecutive displacements. the first is 76 km at 39.8◦ west of north, and the second is 156 km at 59.9◦ east of north. what is the magnitude of the plane’s total displacement? answer in units of km. 020 (part 2 of 2) 10.0
Answers: 1
Physics, 22.06.2019 07:40
Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents
Answers: 2
Physics, 22.06.2019 14:30
Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?
Answers: 1
Physics, 22.06.2019 14:40
You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.
Answers: 2
A yoyo is a toy made of three uniform density disks with a string wrapped around the middle disk. Th...
Mathematics, 23.10.2019 18:00
Computers and Technology, 23.10.2019 18:00