Achild pulls a sled up a snow-covered hill. in the process, the child does 405 j of work on the sled. if she walks a distance of 15 m up the hill, how large a force does she exert on the sled?

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?