) The current world record for the 100 m dash is 9.58 s, held by Usain Bolt of Jamaica. Calculate his average speed in miles per hour. Note that 1 mile = 1.609 km.

The velocity of a curling stone is due east. what will be the direction of the momentum of the curling stone as it moves?

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?