posted by Teri .
A car drives along a road section free of curves with speed v0 first through the hollow of a valley (radius of curvature r1) and then over a mountain top (radius of curvature r2). Let the driver have mass m.
• What changes in his weight does the driver observe when passing through hollow and top?
• At which speed vG at the mountain top does the vehicle loose contact with the ground?
State the characteristic of dry friction