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- You are playing a game and you push a cart to give it in. speed. The cart starts at the bottom (zero) of a ramp and after reaching the top of the ramp, the cart travels across a horizontal track w/ friction. The mass of the cart is 44 x 10^-3 kg. The ramp is 56 cm high. The length is 70 cm. What can you infer of the intial speed in (m/s)Lhte In 2012, Austrian skydiver, Felix Baumgartner, set a record for the highest exit altitude of 127 852 feet. He jumped from a helium balloon located in the Earth's stratosphere (see figure). At that altitude the atmosphere is too thin to breathe, so Baumgartner wore a special pressurized suit. During his free fall toward the earth, he reached a maximum speed of 843.6 mph, which is greater than the speed of sound. This set a record for greatest speed achieved during free fall and also set off a small sonic boom heard by his friends and family on the ground. Assume the effect of air resistance can be neglected and the acceleration due to gravity remains constant during his fall with a value of 9.807 m/s² and calculate the distance he fell before reaching 843.6 mph. ZENITH https://www.redbull.com/int-en/projects/red-bull-stratos1. You are conducting an experiment to find the kinetic coefficienct of friction between a 5kg box and a ramp. The ramp has an angle of 25° above the horizontal. You start the box from rest. release it. and let it slide down the ramp. a) If the box starts at a height of 1 meter above the ground. what is the theo- retical value of its velocity at the bottom of the ramp? b) When you do the experiment, you find that the experimental value of the final velocity is 3.5 m/s. How much mechaical energy was “lost”? c) Assume that all of the mechanical energy 'lost' in part b) was due to Friction. Draw a free-body diagram. and determine the magnitude of the Normal Force acting on the box. d) Using the Normal force, determine the co-efficient of friction between the box and the ramp, if the system lost the amount of energy you caculated in part b). Hint: Use the work done by friction.
- A wagon with its passenger sits at the top of a hill. A strong wind suddenly rolls the wagon 188m down a 28 degree incline to the bottom of the hill. What is the wagons speed in m/s? Assume friction is negligible.A 2 kg ball is thrown off a 73 m high cliff with a speed of 4 m/s. How fast (in m/s) is the ball going when it hits the ground? Use g = 9.8 m/s2.A PHYS 1510 student decides to take revenge on the awful Canadian Goose that has been chasing it all over the campus. The student ambushed the goose, jumping off a short wall to startle it. The student weighs 49.2kg. The wall is 1.47m tall. Initial speed was 1.767 m/s because the student pushed off when jumping. What was the student's speed when they reached the ground? (Include SI units)
- You push a 80-kg file cabinet to the right on a frictionless horizontal surface with a force of 175 N from rest, the cabinet moves a distance of 12 m. What is the final speed of the cabinet, in m/s? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.On a 119 meter high roller coaster is a 75 kg car at rest. Assuming there is no friction, what will its velocity be at the bottom? a) The car from the previous roller coaster begins its journey towards a second climb with a speed of 58 m / s. Assuming there is no friction, how high will it reach before stopping?A waterslide is 42m long and has a vertical drop of 12m. If a 60kg woman starts down theslide with a speed of 3.0m/s, calculate her speed at the bottom. There is a 120N averagefriction force opposing her motion.
- Lisa takes her dog to the local dog park every morning. She walks with her dog 6 blocks north, 6 blocks west, and 6 blocks south in order to get to the park. What is her total distance traveled? Answer: blocks hpA stone thrown from the top of a building is given an initial velocity of 20.2 m/s straight upward. The stone is launched 50.0 m above the ground, and the stone just misses the edge of the roof on its way down as shown in the figure below. B te = ? a,B = -9.80 m/s? LA = 0 YA = 0 a, A = -9.80 m/s2 c le = 2t8 Vc = 0 a,c = -9.80 m/s? to = 5.00 s 4D = -9.80 m/s2 YE = -H aE = -9.80 m/s? Position, velocity, and acceleration values at various times for a falling stone thrown initially upward with a velocity Vvi = 20.2 m/s. Many of the quantities in the labels for points in the motion of the stone are calculated in the example. Can you verify the other values that are not? (a) Using t, = 0 as the time the stone leaves the thrower's hand at position A, determine the time at which the stone reaches its maximum height. SOLUTION You most likely have experience with dropping objects or throwing them upward and watching them fall, so this problem should describe a familiar experience. To simulate…At the Earth's surface, a projectile is launched straight up at a speed of 7.7 km/s. To what height will it rise? Ignore air resistance. 3.00E6 X Your response differs from the correct answer by more than 10%. Double check your calculations. m Need Help? Read It