A girl stands on a moving sidewalk (conveyor belt) that is moving to the right at a speed of 2 m/s relative to the ground. A dog runs on the belt toward the girl at a speed of 8 m/s relative to the belt. What is the speed of the dog relative to the ground?

Explanation:

Given

Speed of elevator is given by

Dog is running towards the girl with velocity w.r.t sidewalk

Therefore velocity of dog w.r.t ground

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

the force on the thing and the distance the force moves the thing