Force of Elevator on Person

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Presentation transcript:

Force of Elevator on Person Created for CVCA Physics By Dick Heckathorn 20 October 2K + 4

Elevator at rest. m = 50 kg Fscale on girl = 490 N a = 0 m/s2 Fnet = 0 Fearth on girl = 490 N = m . g Fscale on girl = 490 N

Elevator up, accelerating up Fa = 150 N m = 50 kg Fscale on girl = 490 N a = 3 m/s2 Fa = 150 N Fearth on girl = 490 N Fscale on girl = 490 N + 150 N = 640 N

Elevator up, constant speed m = 50 kg Fscale on girl = 490 N a = 0 m/s2 Fnet = 0 Fearth on girl = 490 N Fscale on girl = 490 N

Elevator up, slowing down Fscale on girl = 490 N m = 50 kg a = 3 m/s2 Fa = 150 N Fearth on girl = 490 N Fa = 150 N Fscale on girl = 490 N - 150 N = 340 N

Elevator at rest. m = 50 kg Fscale on girl = 490 N a = 0 m/s2 Fnet = 0 Fearth on girl = 490 N Fscale on girl = 490 N

Elevator down, accelerating down Fscale on girl = 490 N m = 50 kg a = 3 m/s2 Fa = 150 N Fearth on girl = 490 N Fa = 150 N Fscale on girl = 490 N - 150 N = 340 N

Elevator down, constant speed m = 50 kg Fscale on girl = 490 N a = 0 m/s2 Fnet = 0 Fearth on girl = 490 N Fscale on girl = 490 N

Elevator down, slowing down Fa = 150 N m = 50 kg Fscale on girl = 490 N a = 3 m/s2 Fa = 150 N Fearth on girl = 490 N Fscale on girl = 490 N + 150 N = 640 N

Elevator at rest. m = 50 kg Fscale on girl = 490 N a = 0 m/s2 Fnet = 0 Fearth on girl = 490 N Fscale on girl = 490 N

Cable cut Fscale on girl = 490 N m = 50 kg a = 9.8 m/s2 Fa = 490 N Fearth on girl = 490 N Fa = 490 N Fscale on girl = 0 N = 490 N Weight girl = - 490 N 490 N

That’s all folks!