The frequency of oscillation of a spring-block simple harmonic oscillator is given by f = 2 . such an oscillator composed of a 1 kg block attached to a wall via a spring of stiffness k = 100 n/m starts in equilibrium. a blow from a hammer then sets the block moving inward at a speed of 5 m/s. which of the following best approximates the period and amplitude of the resulting oscillations? a. t= 1.6 s, a = 50 cm b. t= 1.6 s, a = 12.5 cm ° c. t= 0.6 s, a = 50 cm 0 d. t= 0.6 s, a = 12.5 cm

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

If the pressure in a gas is doubled while its volume is held constant. true or false

Your physics assignment is to figure out a way to use electricity to launch a small 6.0-cm-long plastic drink stirrer. you decide that you'll charge the little plastic rod by rubbing it with fur, then hold it near a long, charged wire, as shown in figure p23.56 . when you let go, the electric force of the wire on the plastic rod will shoot it away. suppose you can uniformly charge the plastic stirrer to 10 nc and that the linear charge density of the long wire is 1.0 x10-7 c/m. what is the net electric force on the plastic stirrer if the end closest to the wire is 2.0 cm away?