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Unformatted text preview: does it take to hit the ground? D = V i t + at 2 85 m = (0 m/s)(t) + (9.8m/s 2 )t 2 (A) 4.2 s 5. A rock climbers show loosens a rock, and her climbing buddy at the bottom of the cliff notices that the rock takes 3.20 s to fall to the ground. How high up the cliff is the rock climber? D = V i t + at 2 D = (0 m/s)(3.20 s) + (9.8m/s 2 )(3.20 s) 2 (C) 50.0 m 6. A car traveling at 91.0 km/h approaches the turnoff for a restaurant 30.0 m ahead. If the driver slams on the brakes with an acceleration of -6.40 m/s 2 , what will be her stopping distance? V f 2 = V i 2 + 2ad 2 = (91.0 km/h) 2 + 2(-6.40 m/s 2 )d-(25.3 m/s) 2 = (-12.8 m/s 2 )d (C) 50.0 m 7. What is the correct formula manipulation to find acceleration when using the equation V f 2 = V i 2 + 2ad? (D) (V f 2- V i 2 ) / 2d...
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This note was uploaded on 12/19/2010 for the course BIO 0081 taught by Professor Haowu during the Spring '10 term at CUNY York.
- Spring '10