At t=0, an 870-g mass at rest on the end of a horizontal spring (k = 188 N/m ) is struck by a hammer which gives it an initial speed of 2.22 m/s . Determine the period of the motion.
Determine the frequency of the motion.
Determine the amplitude.
Determine the maximum acceleration.
Determine the total energy.
Determine the kinetic energy when x=0.40A where A is the amplitude.

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?

Simon is writing a story about an astronaut whose spacecraft has been boarded by space pirates. the astronaut has her lucky penny in her hand behind her back as the space pirates break into the control room. she has just locked the controls so that the ship is accelerating in the direction of the control room’s ceiling. simon wants the astronaut to use the penny to hit a button on the control panel to turn off the lights and escape. the button is located a short distance behind and below the astronaut’s hands. how should simon use the theory of relativity to describe what the astronaut must do in order to hit the button?