Physics 1 Problem Solutions 69

Physics 1 Problem Solutions 69 - Chapt. 6 Newtons Laws and...

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Unformatted text preview: Chapt. 6 Newtons Laws and Dynamics II 65 12. A yo-yo of 200 g and string length 80 cm is swirled around by holding the end of the string in the absence of gravity and air drag. The string will break if tension force exceeds 10 N. About how fast can the yo-yo be swung without breaking the string? a) 3 . 2 m / s. b) 6 . 3 m / s. c) 80 m / s. d) 200 m / s. e) 10 m / s. 006 qmult 00472 3 5 1 tough thinking: lifting from a hump Extra keywords: physci KB-61-39 13. There is a hump on the road with a cylindrical shape. The radius of the hump is 14 . 7 m. In an idealized picture, above about what horizontal speed must a car at the top of the hump lift from the hump? a) 12 m / s. b) 14 . 7 m / s. c) 144 m / s. d) 10 m / s. e) 10 . 4 m / s. 006 qmult 00473 3 5 4 tough thinking: lifting from a hump Extra keywords: physci KB-61-39 14. There is a hump on the road with a cylindrical shape. The radius of the hump is 25 . 6 m. In an idealized picture, above about what horizontal speed must a car at the top of the hump lift...
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