The Apollo astronauts landed on the Moon and explored it. When they lifted off to return home, they first needed to make lunar orbit, which required a speed of about 5, 500 ft/s The lunar module ascent engine developed a vacuum specific impulse of 310 s. What is the vehicle mass ratio that will allow the engine to achieve the required speed?
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- The froghopper holds the title of the best jumper of the animal world. A 0.0198gram froghopper can accelerate at 4,000 m/s2 over 2.0 mm as it jumps. What is the impulse delivered to the froghopper as it makes this jump?A north-going Zak has a mass of 50kg and is traveling at 4m/s. A south-going zak has a mass of 40 kg and is traveling at 5m/s. If they have a perfectly inelasic collision, what is their final velocity ? What are the initial and final total kinetic energy ?In a dance jump, the dancer lifts their center of mass 40 cm. When they land, they bend their knees as they slow to a stop and their center of mass lowers by 7.0 cm in 50 ms. The dancer’s mass is 60 kg. (a) What is the impulse on their body as they land? (b) What is the average force on the dancer’s body? {3360 N}
- Suppose F₁ = 2000 N. (Figure 1) You may want to review (Pages 262-266). Figure F, (N) F 0- 0 N. 2 4 6 1 of 1 -t (ms) Part A What impulse does the force shown in the figure exert on a 250 g particle? Express your answer in newton-seconds to two significant figures. WD ΑΣΦ J = Submit Previous Answers Request Answer X Incorrect; Try Again Provide Feedback ? N.SA model rocket is constructed with a motor that can provide a total impulse of 26.0 N-s. The mass of the rocket is 0.117 kg. What is the speed that this rocket achieves when it is launched from rest? Neglect the effects of gravity and air resistance. Number i UnitsA 1500 kg car traveling to the north is slowed down uniformly from initial velocity of 20 m/s by a 6000 N braking force acting opposite the car’s motion. Use the impulse-momentum theorem to answer the following questions What is the car’s velocity after 2.00 s? How far does the car move during 2.00 s? How long does it take the car to come to a complete stop?
- microblology textb. PHY166_onlıne Jab. Pinterest Word sdev E Reading li Constants An atomic nucleus at rest decays radioactively into an alpha particle and a different nucleus. Part A What will be the speed of this recoiling nucleus if the speed of the alpha particle is 2.2x105 m/s ? Assume the recoiling nucleus has a mass 57 times greater than that of the alpha particle. Express your answer to two significant figures and include the appropriate units. HÁ Vnucleus = Value Units Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Provide Feedback Next > P Pearson Copyright © 2021 Pearson Education Inc. All rights reserved. I Terms of Use | Privacy Policy | Permisstons | Contact Us | V0 3:44 acer云 HI 5 F. %24 -10 Part A Jeanette is playing in a 9-ball pool tournament. She will win if she sinks the 9-ball from the final rack, so she needs to line up her shot precisely. Both the cue ball and the 9-ball have mass m, and the cue ball is hit at an initial speed of v. Jeanette carefully hits the cue ball into the 9-ball off center, so that when the balls collide, they move away from each other at the same angle 0 from the direction in which the cue ball was originally traveling (see figure). Furthermore, after the collision, the cue ball moves away at speed vf, while the 9-ball moves at speed vp. (Figure 1) Find the angle 0 that the 9-ball travels away from the horizontal, as shown in the figure. Express your answer in degrees to three significant figures. > View Available Hint(s) For the purposes of this problem, assume that the collision is perfectly elastic, neglect friction, and ignore the spinning of the balls. Submit Provide Feedback Figure 1 of 1 MacBook Air 08 F3 O00 000 F2…Question 1 A 0.5 kg ball is thrown vertically upwards with an initial velocity of 10 m s¹¹. At its highest point, it momentarily stops before falling back down to the ground. Calculate the impulse experienced by the ball during the upward journey. ABCD 5 NS - 5 Ns ONS 10 N s
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