Concept explainers
Landing on Mars When the twin exploration rovers, Spirit and Opportunity, landed on Mars, their method of landing was unique and elaborate. After initial braking with rockets and parachutes to a virtual standstill several meters above the ground, the rovers inflated four air bags with six lobes each. The rovers wore thon detached from the parachutes and allowed to drop in free fall (3.72 m/s2) to the surface, where they bounced about 12 times before coming to rest. They then deflated their air bags, righted themselves, and began to explore the surface Figure 4-32 shows a rover with its surrounding cushion of air bags making its first contact with the Martian surface. Assume that the first bounce of the rover is with an initial speed of 9.92 m/s at an angle of 75.0° above the horizontal. (a) What is the maximum height of a rover between its first and second bounces? (b) How much time elapses between the first and second bounces? (c) How far does a rover travel in the horizontal direction between its first and second bounces?
Figure 4-32
Problem 80
Want to see the full answer?
Check out a sample textbook solutionChapter 4 Solutions
Physics (5th Edition)
Additional Science Textbook Solutions
Essential University Physics: Volume 2 (3rd Edition)
Essential University Physics: Volume 1 (3rd Edition)
Introduction to Electrodynamics
Lecture- Tutorials for Introductory Astronomy
College Physics (10th Edition)
An Introduction to Thermal Physics
- Students are given two spherical balls made of different materials, but of identical mass and diameter to experiment with. Each ball is dropped from an initial height, h0. The “sad ball” comes to rest without visibly bouncing when it strikes the tabletop. The “happy ball” bounces up to a final height h, where h<h0 A fellow student wants to use one of the balls in a carnival game where cups are knocked over by a thrown ball. Which ball should they use, happy or sad? In a clear, coherent, paragraph-length response that may also contain figures and/or equations, explain what physics principles explain why the happy ball bounces higher off of the tabletop and explain which ball makes the better choice as a projectile in the carnival game. COMPLETE THE TABLE BELOW A Answer the Question B Basic Physics C Cite Information D Draw it all togetherarrow_forwardDuring a routine flight in 1956, test pilot Tom Attridge put his jet fighter into a 20 dive for a test of the aircraft’s 20 mm machine cannons. While traveling faster than sound at 4000 m altitude, he shot a burst of rounds.Then, after allowing the cannons to cool, he shot another burst at 2000 m; his speed was then 344 m/s, the speed of the rounds relative to him was 730 m/s, and he was still in a dive. Almost immediately the canopy around him was shredded and his right air intake was damaged.With little flying capability left, the jet crashed into a wooded area, but Attridge managed to escape the resulting explosion. Explain what apparently happened just after the second burst of cannon rounds. (Attridge has been the only pilot who has managed to shoot himself down.)arrow_forwardCES Chapter 13, Problem 010 GO Two dimensions. In the figure, three point particles are fixed in place in an xy plane. Particle A has mass m, = 5 g, particle B has mass 2.00ma, and particle C has mass 3.00mA. A fourth particle D, with mass 4.00ma, is to be placed near the other three particles. What (a) x coordinate and (b) y coordinate should particle D be placed so that the net gravitational force on particle A from particles B, C, and D is zero (d = 17 cm)? em em BO plem 1.5d blem oblem roblem Units (a) Number Problem Units (b) Number Problem Click if you would like to Show Work for this question: Open Show Workarrow_forward
- A team of astronauts is on a mission to land on and explore a large asteroid. In addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. With what minimum initial speed ?esc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? Assume that the asteroid is approximately spherical, with an average density ?=2.93×106 g/m3 and volume ?=1.94×1012 m3 . Recall that the universal gravitational constant is ?=6.67×10-11 N·m2/kg2 .vesc = ? m/sarrow_forwardAn atomic nucleus at rest decays radioactively into a smaller nucleus and an alpha particle (i.e. a helium nucleus). The alpha particle is leaving the original nucleus at a speed of 2.5 × 105m/s. Will the smaller nucleus remain at rest or will it move as well? Explain.arrow_forwardAriane 5 is a European Space Agency rocket designed to launch geostationary satellites into orbit and to send payloads to low orbit. Ariane 5 launches from the Kourou space center in French Guiana. To overcome the Earth's gravitational attraction, very powerful engines are required to ensure takeoff. The two side tanks are propellants that work with solid fuel, during takeoff they exert 6975 kN each on the Earth. The central tank, which is the engine of the "cryogenic" main stage, exerts 1074 kN on the Earth. If the mass of Ariane 5 at takeoff is 745 tons, what is the magnitude of the vertical acceleration of Ariane 5, in ?/?^2. Consider ?=9.8 ?/?^2 Select one: 11.25 20.17 10.37 20.60arrow_forward
- An uncrewed mission to the nearest star, Proxima Centauri, is launched from the Earth's surface as a projectile with an initial speed of 43.1 km/s, just enough for the spacecraft to escape the Earth's gravity and leave the solar system. Ignoring air resistance and the Earth's rotation, what is the speed of the spacecraft when it is more than halfway to the star? Assume we are ignoring the effect of the Sun on the spacecraft.arrow_forwardSuppose we race a disk and a hollow spherical shell, like a basketball. The spherical shell has a mass M and a radius R; the disk has a mass 2M and a radius 2 R. If the two objects are release at rest, and the height of the ramp is h=.81 m, find the speed of the disk and the spherical shell when they reach the bottom of the ramparrow_forwardA man walks up to you and hands you an energy drink with mass 0.4 kg. You decide energy drinks aren't for you and throw it on the ground. At the moment the energy drink leaves your hand, it is moving downwards with a speed of 7 m/s and is 1 meter above the ground. Calculate the speed of the energy drink in m/s just before it impacts the ground. As before, assume g = 10 m/s^2. You may neglect air friction. Round your answer to one decimal place.arrow_forward
- A uranium nucleus (mass 238 units) at rest decays into helium nucleus (mass 4.0 units) and thorium nucleus (mass 234 units). If the speed of the helium nucleus is 6.0 x 10^5 m/s, what is the speed of the thorium nucleus?arrow_forwardA nerve conduction velocity test (NCV) is an electrical test that is used to evaluate the function of nerves. A NCV on a patient's sciatic nerve (length of 0.90 mm) reveals a conduction velocity of 30 m/sm/s. How long did it take the impulse to travel along the nerve? 27 s 0.90 s 0.030 s 33 sarrow_forwardArcherfish are one of the few fish that prey on land insects and other small animals. They do this by shooting a jet of water from their specialized mouths at an insect resting on a leaf or plant stem above the water (see photo). This often stuns the insect, causing it to fall into the water, where it can be eaten. In the drawing, an archerfish is shooting water toward an unsuspecting horsefly at rest on a blade of marsh grass above the surface of a pond. Use the information in the drawing to calculate how high (h) the horsefly is above the water. The initial velocity of the water (vo) is 3.2 m/s, and assume that the projected water reaches its maximum height above the pond's surface when it strikes the horsefly. to search Varren l'hotographic FOWL A O 1 10 OF 55°F Mostly cloudyarrow_forward
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning