Ignoring details associated with friction, extra forces exerted by arm and leg muscles, and other factors, we can consider a pole vault as the conversion of an athlete's running kinetic energy to gravitational potential energy. If an athlete is to lift his body 3.8 m during a vault, what speed (in m/s) must he have when he plants his pole

v = 8.63 m/s

Explanation:

Neglecting the frictional forces, the law of conservation of energy can be applied to this situation as follows:

Potential Energy Gained By Athlete = Kinetic Energy Lost By Athlete

mgh = (0.5)mv²

gh = (0.5)v²

v = √2gh

where,

v = speed that the athlete must have when he plants the pole = ?

g = acceleration due to gravity = 9.8 m/s²

h = Height to be achieved by the athlete = 3.8 m

Therefore,

v = √(2)(9.8 m/s²)(3.8 m)

v = 8.63 m/s

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation: