1. Vivian is walking to the hairdresser\'s at 1.3 m/s when sheglances at her wat
ID: 1752595 • Letter: 1
Question
1. Vivian is walking to the hairdresser's at 1.3 m/s when sheglances at her watch and realizes that she is going to be late forappointment. Vivian gradually quickens her her pace at a rateof 0.090 m/s to the second power . a) what is vivian's speed after10.0 s? b) at this speed , is vivian walking ,jogging, or running very fast? 2. A torpedo fired from a submerged submarine is propelledthrough the water with a speed of 20.00 m/s and explodes uponimpact with a target 2000.0 m away. if the sound of the impact isheatrd 101.4 s after the torpedo was fired, what is the speed ofsound in water? (because the ttorpedo is held at a constant speedby its propeller, the effect of water resistance can beneglected.) 1. Vivian is walking to the hairdresser's at 1.3 m/s when sheglances at her watch and realizes that she is going to be late forappointment. Vivian gradually quickens her her pace at a rateof 0.090 m/s to the second power . a) what is vivian's speed after10.0 s? b) at this speed , is vivian walking ,jogging, or running very fast? 2. A torpedo fired from a submerged submarine is propelledthrough the water with a speed of 20.00 m/s and explodes uponimpact with a target 2000.0 m away. if the sound of the impact isheatrd 101.4 s after the torpedo was fired, what is the speed ofsound in water? (because the ttorpedo is held at a constant speedby its propeller, the effect of water resistance can beneglected.)Explanation / Answer
given a) the initial speed is U = 1.3m/s the acceleration is a = 0.090 m/s2 time t = 10 s so the final speed is V = u +at = 1.3m/s +(0.090m/s2)(10s) = 2.2 m/s b)speed walking time t = 10 s so the final speed is V = u +at = 1.3m/s +(0.090m/s2)(10s) = 2.2 m/s b)speed walkingRelated Questions
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