4. A 12000 kg railroad car is coasting along a level, frictionless track at a constant speed of 25 m/s, when a 3000 kg load is dropped vertically onto the car from above. What will its new speed be, assuming the load stays on the car?
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Answer all questions in the space provided. Show ALL your steps in your calculations. Answer in complete sentences and therefore statements.
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- Choose one practical example or interesting phenomenon associated with the special or general theories of relativity discussed in your text. Give a brief description of your choice and explain how the relativity theories allow us to better understand the the associated observations.I solved for part a and part b which asked part a) The plane flies at 554 miles per hour, relative to the skyscraper. If Casey throws the ball to Matt at 23 miles per hour, relative to the plane, then what speed will Myles see the ball move at? (I got speed of 577 miles per hour). For part b they asked "Matt subsequently tosses the ball back to Casey, at 25 miles per hour. What speed does Myles see the ball move at? (I got 529 mph) now I need help with part c and part d. part c) Lets's imagine that instead of an airplane, Casey and Matt are on a rocketship, traveling at 93% of the speed of light. Additionally, Casey and Matt have been training very hard and so can toss the ball incredibly fast. If Casey throws the ball to Matt at 25% of the speed of light, relative to the rocket, then what speed will Myles see the ball move at? part d) Did you use Galilean Relativity or Special Relativity to compute the speeds in part a-c? Why did you choose to use the equation you chose for each…A plane begins traveling at a(v) = ao – bv from a stationary position Part 1) determine the plane's v(t). Show in terms of ao and b. Part 2) determine the plane's distance traveled s(t). Show in terms of ao and b. Part 3) determine the plane's a(t). Show in terms of ao and b. Part 4) determine t = T* and s = S* when v reaches a determined takeoff value V*. Show T* and S* in terms of ao, bv and V*
- Review Homework The assignment does not need to be submitted " you are encountering difficulties with this homework reach out to the instructor, the student instructor, or a tutor. The instructor's office hours are MWF 1:30-2:30 pm and M 7-8 pm, F 8-9pm. À Race Car A 1200kg race car is initially at rest. When the driver steps on the gas, the car's engine to pushes it forward with a constant force of 6200N. a 420ON 1. What is the acceleration of the car? 1200kg 2. How far will the car go in 3.0s? 2 Reading a ruler The picture below shows a tape measure measuring a board. How long is the board? Be sure to provide a ± accuracy with your number. 51 in 52 53 54 5! 53.25in=.01in 3 Water bottle full of sand Sand has a density of 1621 . 1. What is the mass of a one liter water bottle full of sand? 2. What is the weight of the water bottle? 1Chap and Gravity Conversion of Mass to Energy converted to energy. How many joules (J) of energy are produced? In a nuclear reactor, 0.15 kilogram (kg) of uranium-235 is completely 1. Read and Understand What information are you given? Mass = m = 0.15 kg Speed of light = c = 300,000,000 m/s = 3 × 108 m/s 2. Plan and Solve What unknown are you trying to calculate? The amount of energy produced = E = ? What formula contains the given quantities and the unknown? E = mc2 Replace each variable with its known variable and known value. E = (0.15 kg)(3.00 × 108 m/s)² E = 1.35 x 10¹6 kg-m²/s² = 1.4 x 1016 J 3. Look Back and Check Is your answer reasonable? Yes, the calculated number is quite large compared to the mass, and the units indicate energy. 2. In a nuclear reactor, 0.20 kilogram of uranium-235 and 0.50 kilogram of plutonium-239 are completely converted to energy. How many joules of energy are produced?Milestone A: Walk 3.2 km (~2 miles) towards northeast. Milestone B: Walk 1.3 km towards southeast. Milestone C: Walk 2.4 km directly south. Surprise at the end! You have arrived at the treasure! Distance: What is the total distance traveled if you walk the distance A, B, C? Give your answer in km and miles. 2. Direction: a. what is meant by “north east?” b. what direction would this be on a cartesian coordinate system? c. What is meant by “south east?” d. What direction would this be on a cartesian coordinate system? e. What about “south”? f. What direction on cartesian coordinate system? 3. Draw the diagram: include drawing the resultant a. What does the resultant vector represent? 4. Calculate: use trigonometry to find the displacement.