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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- A 500 g hockey puck slides across frictionless ice with an initial speed of 2.0 m/s. A compressed air gun is used to exert a 1.0 N force on the puck and is aimed at the puck’s front edge at 30° below the horizontal. This force is applied continuously as the puck moves 50 cm. What is the puck’s final speed? answer is 2.39m/s. please show how.arrow_forwardA 8.00-kg block of ice is released from rest at the top of a 1.60-m long frictionless ramp, slides downhill, reaching a speed of 3.25 m/s at the bottom. What is the angle between the ramp and the horizontal?arrow_forwardFigure P7.44 45. Review. Two constant forces act on an object of mass m = QIC 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, its kinetic energy the object's (f) from mv, and (g) its F2 F kinetic from 150° energy mu + EF · A. (h) What conclusion can you draw by comparing the answers to parts (f) and (g)? 35.0° m Figure P7.45arrow_forward
- 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)arrow_forwardCaroline takes her baby sister Hannah to the neighborhood park and places her in the seatof the children’s swing. Caroline pulls the L = 1.8 m long chain back to make an angle θ = 26◦ withrespect to the vertical and lets 14 kg Hannah (swing mass included) go. (a) Determine Hannah’s speed at the lowest point in the trajectory. (b) What is the tension in the swing chain at this low point? Assume the chain itself has negligible mass.arrow_forward45. 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_forward
- The heaviest watermelon weighed in at 159 kg (350.5 lbs.) and was grown by Chris Kent (USA) of Sevierville, Tennessee. Chris releases the watermelon from rest from the top of a 150.0m tall building by a small crane. We neglect air resistance. If needed, use 9.80 m/s2 for the magnitude of g. What is the time it takes to hit the ground after being released and what will be the final impact velocity when it hits the ground? Report answers to 3 sig figs.arrow_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 cable with 21.37 N of tension pulls straight up on a 1.88 kg block that is initially at rest. What is the blocks speed after being lifted 1.56 m?arrow_forward
- A 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_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning