A0.23 kg mass at the end of a spring oscillates 2.0 times per second with an amplitude of 0.15 m

part a

determine the speed when it passes the equilibrium point.

part b

determine the speed when it is 0.10 m from equilibrium.

part c

determine the total energy of the system.

part d

determine the equation describing the motion of the mass, assuming that at t=0, x was a maximum.

determine the equation describing the motion of the mass, assuming that at , was a maximum.

x(t)=(0.075m)cos[2π(2.0hz)t]
x(t)=(0.15m)sin[2π(2.0hz)t]
x(t)=(0.15m)cos[2π(2.0hz)t]
x(t)=(0.15m)cos[(2.0hz)t]

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Ahypothesis is? close agreement by competent observers of observations of the same phenomena. a guess that has been tested over and over again and always found to be true. an educated guess that has yet to be proven by experiment. the long side of a right triangle. a synthesis of a large collection of information that includes guesses.

For problems 1-3, consider a simple dc brush motor with a permanent magnet stator. with an an consider a simple dc brush motor with a permanent magnet ae supply voltage of 100 v, the no-load speed of the motor is 1000 rpm. this motor can provide a torque of 1.9 n-m at 800 rpm drawing a current of 2 a current are both zero at no load.) 1. with an armature supply voltage of 100 v, the motor is operated at 900 rpm. what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input? what is the energy efficiency of the motor? with an armature supply voltage of 100 v, the motor is operated at 1100 rpm (where it acts as a generator). what torque input is required? what mechanical power is required what current is generated? what is the electrical power generated? what is the energy efficiency of the motor acting as a generator? 2. with an armature supply voltage raised to 120 v, the motor is operated at 1000 rpm. what is the no-load speed? what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input what is the energy efficiency of the motor? 3.