Physics Waves And Oscillations Level: Misc Level
The maximum speed of a 2.57 kg mass attached to a spring is 0.610 m/s, and the maximum force exerted on the mass is 15.8 N.what is the amplitude of motion for this mass? what is the force constant of the spring? what is the frequency of this system?
Physics Waves And Oscillations Level: Misc Level
Calculate the period of oscillation of a disk of mass 0.376 kg and radius 0.143 m if it is pivoted about a small hole drilled near its rim.
Physics Waves And Oscillations Level: Misc Level
A 1.44 g spider oscillates on its web, which has a damping constant of 3.30 E-5 kg /s. How long does it take for the spider's amplitude of oscillation to decrease by 11.0 % ?
Physics Waves And Oscillations Level: Misc Level
A bunch of grapes is placed in a spring scale at a supermarket. The grapes oscillate up and down with a period of 0.480 s and the spring in the scale has a force constant of 641 N /m. what is the mass of the grapes?
Physics Waves And Oscillations Level: Misc Level
A child rocks back and forth on a porch swing with an amplitude of 0.198 m and a period of 2.97 s. Assuming the motion is approximately simple harmonic, calculate the child s maximum speed.
Physics Rotational Mechanics Level: Misc Level
A ball rolls on a circular track of radius 0.420 m with a constant angular speed of 1.23 rad /s. If the angular position of the ball at t =0 is 0 =0, calculate the x component of the ball s position at 2.46 s.
Calculate the x component of the ball s position at 4.99 s.
Physics Rotational Mechanics Level: Misc Level
A stunt man whose mass is 70 kg swings from the end of a 4.1 m long rope along the arc of a vertical circle. Assuming that he starts from rest when the rope is horizontal, find the tensions in the rope that are required to make him follw his circular path at each of the following points.
(a) at the beginning of his motion
(b) at a height of 1.5 m above the bottom of the circular arc
(c) at the bottom of the arc
Physics Rotational Mechanics Level: Misc Level
A roller-coaster vehicle has a mass of 494 kg when fully loaded with passengers
a) If the vehicle has a speed of 18.0 m /s at point A, what is the force of the track on the vehicle at this point?
(b) What is the maximum speed the vehicle can have at point B in order for gravity to hold it on the track?
Physics Rotational Mechanics Level: Misc Level
A coin with a diameter of 2.40 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 18.4 rad /s and rolls in a straight line without slipping. If the rotation slows with an angular acceleration of magnitude 1.81 rad /s 2, how far does the coin roll before coming to rest?
Physics Units Level: Misc Level
A tire placed on a balancing machine in a service station starts from rest and turns through 4.4 revolutions in 1.2 s before reaching its final angular speed.Calculate its angular acceleration.
Physics Rotational Mechanics Level: Misc Level
A potter's wheel moves from rest to an angular speed of 0.17 rev /s in 32 s. Find its angular acceleration in radians per second per second.
--- rad /s^2
Physics Electrostatics Level: Misc Level
The absolute potential at the exact center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when each of the other corners is also filled with a charge of + Q ?
a) zero
b) 3.0V
c)9.0 V
d) 12.0V
Physics Current Electricity Level: Misc Level
Can a particle ever move from a region of low electric potential to one of high potential and yet have its electric potential energy decrease? Explain.
Physics Current Electricity Level: Misc Level
State clearly the difference between : a) electric potential and electric field. b) electric potential and electric potential energy.
Physics Electrostatics Level: Misc Level
Is there a point along the line joining two equal positive charges where the electric field is zero? Explain.
