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A 45.3-cm diameter disk rotates with a constant angular acceleration of 2.20 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time.
(a) Find the angular speed of the wheel at t = 2.30 s.
(b) Find the linear velocity and tangential acceleration of P at t = 2.30 s.
(c) Find the position of P (in degrees, with respect to the positive x-axis) at t = 2.30s.
Two automobiles, each of mass 900 kg, are moving at the same speed, 15 m/s, when they have an inelastic collision.(a) In what direction and at what velocity does the wreckage move if one car was driving north and one south? (b) In what direction a..
A professor's office door is 0.90 wide, 2.00 high, 4.00 thick; has a mass of 30, and pivots on frictionless hinges. A "door closer" is attached to door and the top of the door frame. When the door is open and at rest, the door closer exerts the torqu..
Runner A is initially 8.0 mi west of a flagpole and is running with a constant velocity of 6.0 mi/h due east. Runner B is initially 6.0 mi east of the flagpole and is running with a constant velocity of 8.0 mi/h due west. How far are the runners f..
While a woman stands with two feet on a scale, the scale reads 490 N. When she lifts one foot, scale reads more or less.
A flight attendant pulls her 63N flight bag a distance of 308m along a level airport floor at a constant velocity. The force she exerts is 45N at an angle of 57° above horizontal. Find the work she does on flight bag.
Your cell phone battery states that it has a capacity of 1200mAh. That means it can provide constant current supply of 1200mA for 1 hour (or 3600 sec), Your battery provides a constant voltage of 3.7V. What is the energy in Joules stored in the bat..
A 65Kg ice skater pushes off his partner and accelerates backwards at 1.3m/s^2. If the partner accelerates in the opposite direction at 2.0m/s^2, what is mass of the other skater.
what will be the height h of the highest point reached by the skateboarder on the right side of the ramp.
A light rod of length 1.8 m has two point masses of mass 2 kg attached at either end. If the spring constant is 3.7 Nm.rad-1, what is the period of the resulting motion
A small metal bead, labeled A, has a charge of 29 . It is touched to metal bead B, initially neutral, so that the two beads share the 29 charge, but not necessarily equally. When the two beads are after that placed 5.0 apart, the force between the..
A car drives straight off the edge of a cliff that is 58 m high. The police at scene of the accident observed that the point of impact is 121m from the base of cliff. How fast was the car traveling when it went over the cliff.
Point charges q1=? 4.80nC andq2=+ 4.80nC are separated by distance 3.90mm , forming an electric dipole, Find the magnitude of the electric dipole moment
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