Aspacecraft is launched from the surface of the earth with a velocity of 0.600c at an angle of 50.0 above the horizontal, positive x-axis. another spacecraft is moving past with a velocity of 0.700c in the negative x direction. determine the magnitude and direction of the velocity of the first spacecraft

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 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

The image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is