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The equations of motion can be used to solve the above given problem as I did.
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3, (8 points) (Like 2.88) In a relay race, runner #1 (already in motion) must hand...
Name: Lecture Section: 8amロ11am ロ3pm give y PHYS 141-written Homework #02 Due Date: 11:59pm on Wednesday,...
Name: Lecture Section: 8amロ11am ロ3pm give y PHYS 141-written Homework #02 Due Date: 11:59pm on Wednesday, January 30, 2019 For full credit, clear, legible, and correctly-rotated pages must be submitted to the correct location. 1. (6 points) (Based on 2.31) Using this graph showing velocity of an elevator in a tall building as a function of time, calculate 25 20 15 (a) the average acceleration from t-1s to t-3s, (b) the instantaneous acceleration at t-16s, (c) the distance travelled between...
Sally and David are runners participating in a relay race. Sally runs at a constant speed...
Sally and David are runners participating in a relay race. Sally runs at a constant speed of 2.0 m/s. When she is 1.8 m behind David, he starts from rest and begins to run in the same direction as Sally with a constant acceleration of 0.5 m/s^2. When Sally reaches him, she hands him the baton. a) (20 points) How far has David run when he gets the baton? b) (5 points) What is David’s speed at the moment he...
Two runners in a 100 m race start from the same place. Runner A starts as...
Two runners in a 100 m race start from the same place. Runner A starts as soon as the starting gun is fired and runs at a constant speed of 8.00 m/s. Runner B isn’t really paying attention and starts running 2.0 s later and runs at a constant speed of 9.3 m/s. a. Draw a position vs time graph for each runner. b. Who wins the race? c. At the instant the winner crosses the finish line, how far...
4. Two runners in a 100 m race start from the same place. Runner A starts...
4. Two runners in a 100 m race start from the same place. Runner A starts as soon as the starting gun is fired and runs at a constant speed of 8.00 m/s. Runner B isn't really paying attention and starts running 2.0 s later and runs at a constant speed of 9.3 m/s. a. Draw a position vs time graph for each runner. b. Who wins the race? c. At the instant the winner crosses the finish line, how...
4. Two runners in a 100 m race start from the same place. Runner A starts...
4. Two runners in a 100 m race start from the same place. Runner A starts as soon as the starting gun is fired and runs at a constant speed of 8.00 m/s. Runner B isn't really paying attention and starts running 2.0 s later and runs at a constant speed of 9.3 m/s. a. Draw a position vs time graph for each runner. b. Who wins the race? c. At the instant the winner crosses the finish line, how...
1. A runner dashes from the starting line (x0) to a point 98 m away and...
1. A runner dashes from the starting line (x0) to a point 98 m away and then turns around and runs to a point I19 m away from the starting point in 21 seconds. To the nearest tenth of a mis what is the average speed? 2. What is the runner's average velocity in the previous problem? 3. A car accelerates at a constant rate from zero to 33.5 m/s in 10 seconds and then slows to 16.4 m/s in...
1) An 18-year-old runner can complete a 10.0 km course with an average speed of 4.52...
1) An 18-year-old runner can complete a 10.0 km course with an average speed of 4.52 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.07 m/s. How much later (in seconds) should the younger runner start in order to finish the the course at the same time as the older runner? s 2) A sprinter explodes out of the starting block with an acceleration of +3.8 m/s2, which she sustains for 1.4 s. Then,...
1) A 67-kg base runner begins his slide into second base when he is moving at...
1) A 67-kg base runner begins his slide into second base when he is moving at a speed of 3.7 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to friction acting on the runner? (b) How far does he slide? 2) A running 53-kg cheetah has a top speed of 31 m/s. (a) What...
1. A 67-kg base runner begins his slide into second base when he is moving at...
1. A 67-kg base runner begins his slide into second base when he is moving at a speed of 4.5 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to friction acting on the runner? (b) How far does he slide? 2. A 0.32-kg stone is held 1.4 m above the top edge of a...
Sean is running a 100 m dash. When the starter's pistol fires, he leaves the starting...
Sean is running a 100 m dash. When the starter's pistol fires, he leaves the starting block and continues speeding up until 6 s into the race, when he reaches his top speed of 11 m/s. He holds this speed for 2 s; then his speed has slowed to 10 m/s by the time he crosses the finish line 11 s after he started the race 11) Chapter 2, Problem 6 Assume that Sean starts from rest and his motion...
Name: Lecture Section: 8amロ11am ロ3pm give y PHYS 141-written Homework #02 Due Date: 11:59pm on Wednesday, January 30, 2019 For full credit, clear, legible, and correctly-rotated pages must be submitted to the correct location. 1. (6 points) (Based on 2.31) Using this graph showing velocity of an elevator in a tall building as a function of time, calculate 25 20 15 (a) the average acceleration from t-1s to t-3s, (b) the instantaneous acceleration at t-16s, (c) the distance travelled between...
4. Two runners in a 100 m race start from the same place. Runner A starts as soon as the starting gun is fired and runs at a constant speed of 8.00 m/s. Runner B isn't really paying attention and starts running 2.0 s later and runs at a constant speed of 9.3 m/s. a. Draw a position vs time graph for each runner. b. Who wins the race? c. At the instant the winner crosses the finish line, how...
4. Two runners in a 100 m race start from the same place. Runner A starts as soon as the starting gun is fired and runs at a constant speed of 8.00 m/s. Runner B isn't really paying attention and starts running 2.0 s later and runs at a constant speed of 9.3 m/s. a. Draw a position vs time graph for each runner. b. Who wins the race? c. At the instant the winner crosses the finish line, how...
1. A runner dashes from the starting line (x0) to a point 98 m away and then turns around and runs to a point I19 m away from the starting point in 21 seconds. To the nearest tenth of a mis what is the average speed? 2. What is the runner's average velocity in the previous problem? 3. A car accelerates at a constant rate from zero to 33.5 m/s in 10 seconds and then slows to 16.4 m/s in...
Sean is running a 100 m dash. When the starter's pistol fires, he leaves the starting block and continues speeding up until 6 s into the race, when he reaches his top speed of 11 m/s. He holds this speed for 2 s; then his speed has slowed to 10 m/s by the time he crosses the finish line 11 s after he started the race 11) Chapter 2, Problem 6 Assume that Sean starts from rest and his motion...
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