A 1500-kg rocket is to be launched with an initial upward speed of 50.0 m/s. In order to assist its engines, the engineers will start it from rest on a ramp that rises 53° above the horizontal (Fig. P7.50). At the bottom, the ramp turns upward and launches the rocket vertically. The engines provide a constant forward thrust of 2000 N. and friction with the ramp surface is a constant 500 N. How far from the base of the ramp should the rocket start, as measured along the surface of the ramp?
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- 45. Review. Two constant forces act on an object of mass m = QC 5.00 kg moving in the xy plane as shown in Figure P7.45. Force F, is 25.0 N at 35.0°, and force F, is 42.0 N at 150°. At time t = 0, the object is at the origin and has velocity (4.00i2.50j m/s. (a) Express the two forces in unit-vector other answers notation. Use unit-vector notation for your (b) Find the total force exerted on the object. (c) Find the object's acceleration. Now, considering the instant t = 3.00 s find (d) velocity, (e) its position (f) its kinetic energy from m and (g) its the object's kinetic from 1500 energy m .T. (h) What conclusion can you 35.00 draw x m by comparing the answers to parts (f) and (g)? Figure P7.45arrow_forwardReview. Two constant forces act on an object of mass m = 5.00 kg moving in the xy plane as shown in Figure P7.45. Force F, is 25.0 N at 35.0°, and force F, is 42.0 N at 150°. At time t = 0, the object is at the origin and has velocity (4.00î + 2.50j) m/s. (a) Express the two forces in unit-vector notation. Use unit-vector notation for your other answers. (b) Find the total force exerted on the object. (c) Find the object's acceleration. Now, considering the instant t = 3.00 s, find (d) velocity, (e) its position, (f) its from mv, and (g) its the object's kinetic energy F kinetic from 150° energy Jm Σ . Δr. (h) What conclusion can you draw by comparing the answers to parts (f) and (g)? 35.0° m Figure P7.45arrow_forwardA baseball is thrown from the roof of h = 22.0 m-tall building with an initial velocity of magnitude 10.3 m/s and directed at an angle of 53.1 ∘above the horizontal. Part A. What is the speed of the ball just before it strikes the ground? Use energy methods and ignore air resistance. Part B.What is the answer for part (A) if the initial velocity is at an angle of 53.1 ∘ below the horizontal? Part C.If the effects of air resistance are included, will part (A) or (B) give the higher speed? The part (A) will give the higher speed. The part (B) will give the higher speed.arrow_forward
- . Papa Smurf (whose mass is 1kg) is sliding at 1.0 m/s over an icy pond that has no friction. A force of 6 N acts on the smurf in the direction of its motion for 5 s. What is his final velocity?arrow_forwardChapter 08, Problem 022 Your answer is partially correct. Try again. A 54 kg skier starts from rest at height H = 23 m above the end of a ski-jump ramp (see the figure). As the skier leaves the ramp, his velocity makes an angle of e = 27° with the horizontal. Neglect the effects of air resistance and assume the ramp is frictionless. (a) What is the maximum height h of his jump above the end of the ramp? (b) If he increased his weight by putting on a 10 kg backpack, what would h be? End of ramp (a) Number 20 Units'T m/s (b) Number Units 4.4 Click if you would like to Show Work for this question: Open Show Workarrow_forwardAn archer shoots an 18.0-gram arrow at a 43.0-gram target on a wall 32.0 m high. If the arrow is shot at a velocity of v0 = 60.0 m/s, the speed of the arrow is 54.5 m/s when it reaches the target. If the arrow becomes embedded in the target and they both fly off the wall together, at what speed will they leave the wall? Should I use 60.0 m/s in the equation or 54.5 m/s: V’=(0.018)(60.0m/s)/ (0.061) -or- V’=(0.018)(54.5m/s)/ (0.061)arrow_forward
- A 1060 kg rocket is to be launched with an initial upward speed of 53.0 m/s. In order to assist its engines, the engineers will start it from rest on a ramp that rises 53 above the horizontal (Eigure 1). At the bottom, the ramp tums upward and launches the rocket vertically. The engines provide a constant forward thrust of 2000 N. and friction with the ramp surface is a constant 500 N Figure Rocket starts here. 53 1 of 1 Rocket is. launched upward. Y Part A How far from the base of the ramp should the rocket start, as measured along the surface of the ramp? Express your answer in meters to three significant figures. 1961 ΑΣΦΑ d= Submit Beavest Answer Provide Feedback Pearson ? m Next >arrow_forwardA pendulum consists of a 2 kg bob attached to a light string of length 6.0 m. The bob is struck horizontally so that it has an initial horizontal velocity of 3.0 m/s. What is the angle of the string with the vertical when the bob reaches its maximum height?arrow_forwardA small rocket for gathering weather data has a mass of 30 kg and generates 1500 N of thrust. On a windy day, the wind exerts a 20 N horizontal force on the rocket. If the rocket is launched straight up, what is the shape of its trajectory, and by how much has it been deflected sideways when it reaches a height of 1.0 km? Because the rocket goes much higher than this, assume there’s no significant mass loss during the first 1.0 km of flight.arrow_forward
- Keep the track tilted at 14° with the horizontal. Put the friction block on the track surface at the top of the track. Let the friction block slide downwards. The length of the track is 65 cm. Starting from zero speed at the top of the track, what will be the speed of the friction block as it reaches the bottom? Write your answer in m/s. Use u = 0.12 and mass of the friction block = 400 grams.arrow_forwardplease help.arrow_forwardA rocket is descending to the surface of Mars where g = 4 m/s ^ 2 . The rocket is initially 80 m above the planet's surface and is descending downward at 50 m/s. The mass of the rocket is 2500 kg. The rocket will land on the surface with a final velocity of 0. Our goal is to find the upward thrust force on the rocket to make this happen. Find the thrust force on the rocket ? Answer is 49,000 N, please show work.arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning