a runner is traveling with an initial velocity of 0.3m/s in the positive direction accelerates at a constant rate to 0.4m/s^2 for a time of 2 seconds. what is the velocity at the end of 2 seconds?

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

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?

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