"Un ciclista viaja 20 km en una dirección 209 al norte del oeste y luego 30 km en una dirección 35' al este del norte para finalizar se desplaza 12 km al este. Encuentre el modulo del vector RESULTANTE
31.41 km

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?