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- A girl is standing at the edge of a cliff 100. m above the ground. She reaches out over the edge of the cliff and throws a rock straight upward with a speed 8.00 m/s. a) How long does it take the rock to hit the ground? b) What is the speed of the rock the instant before it hits the ground?In 1967, New Zealander Burt Munro set the world record for an Indian motorcycle, on the Bonneville Salt Flats in Utah, with a maximum speed of 183.58 mi/h. The one‐way course was 5.00 mi long. Acceleration rates are often described by the time it takes to reach 60.0 mi/h from rest. If this time was 4.00 s, and Burt accelerated at this rate until he reached his maximum speed, a. how long did it take Burt to complete the course? b. Sketch position vs time, velocity vs. time, and acceleration vs. time graphs for the race.1) Billy Bob drives 35.6km to work each day (down at the call center where he makes up random answers to people's internet problems), at 25.0m/s (ignore speeding up and slowing down; BillyBob belives in "pedal to the metal" and he doesn't believe in stop signs.) As the crow flies, he lives 17.66km due North from where he works. What is his average velocity on his drive to work?
- I need help on this problem: You go south of your friend's house 150 miles away at 50.0 MPH. Your friend is not there so you return home, without spending any time there, at 30 MPH. What is your average speed. What is you average velocity?You throw a small rock straight up from the edge of a highway bridge that crosses a river. The rock passes you on its way down, 7.00 ss after it was thrown. What is the speed of the rock just before it reaches the water 26.0 mm below the point where the rock left your hand? Ignore air resistance.here is my problem, I need help: One simple model for a person running the 100 mm dash is to assume the sprinter runs with constant acceleration until reaching top speed, then maintains that speed through the finish line. If a sprinter reaches his top speed of 11.1 m/sm/s in 2.64 ss , what will be his total time? Express your answer in seconds.
- An express train passes through a station. It enters with an initial velocity of 18.9 m/s and decelerates at a rate of 0.14 m/s² as it goes through. The station is 200 m long. a) How long is the nose of the train in the station?Page 5 of 8 5. As I drive on a back-country road, I suddenly see a deer "frozen" in the headlights. I was driving at 11.4 m/s, but immediately apply the brakes and slow with an acceleration of 3.80 ". a. If the deer was 20.0 m from my vehicle when the brakes were applied, how close did I come to hitting the deer? b. How much time was needed for my vehicle to stop?A driver is traveling 19.0 m/s when she sees a red light ahead. Her car is capable of decelerating at a rate of 3.45 m/s^2, If it takes her 0.390 sto get the brakes on and she is 20.0m from the intersection. How far from the beginning of the intersection will she be?
- . Free Fall. From ear level down the wishing well, a coin is dropped by Liza. The coin falls a distance of 7.00 m before it strikes the water. If the speed of sound is 343 m/s, how long after Liza releases the coin will she hear a splash?A pickup truck is traveling at 30.0 m/s. The driver of the truck applies the brakes and gives the truck a uniform deceleration of 6.50 m/s2² while it travels 20.0 m. What is the speed of the truck in m/s at the end of this distance?You throw a small rock straight up from the edge of a highway bridge that crosses a river. The rock passes you on its way down, 4.00 s after it was thrown. What is the speed of the rock just before it reaches the water 24.0 m below the point where the rock left your hand? Ignore air resistance.