Why is the following situation impossible? An astronaut, together with the equipment he carries, has a mass of 150 kg. He is taking a space walk outside his spacecraft, which is drifting through space with a constant velocity. The astronaut accidentally pushes against the spacecraft and begins moving away at 20.0 m/s, relative to the spacecraft, without a tether. To return, he takes equipment off his space suit and throws it in the direction away from the spacecraft. Because of his bulky space suit, he can throw equipment at a maximum speed of 5.00 m/s relative to himself. After throwing enough equipment, he starts moving back to the spacecraft and is able to grab onto it and climb inside.
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Chapter 9 Solutions
Physics for Scientists and Engineers with Modern, Revised Hybrid (with Enhanced WebAssign Printed Access Card for Physics, Multi-Term Courses)
- Please solve and answer the question correctly. Thank you!!arrow_forwardScientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 7.6-kg projectile from rest to a speed of 5.1 × 103 m/s. The net force accelerating the projectile is 6.4 × 105 N. How much time is required for the projectile to come up to speed?arrow_forwardA space probe of mass 5.00 x 104 kg is traveling at 1.10 x 104 m/s through deep space. No forces act on the probe except that generated by its own engine. No forces act on the probe except that generated by its own engine. The engine exerts a constant external force of 4.00 x 105 N, directed parallel to the displacement, which is 2.50 x 106 m. Determine the final velocity of the probe.arrow_forward
- A 54.9-kg skater is standing at rest in front of a wall. By pushing against the wall she propels herself backward with a velocity of -1.93 m/s. Her hands are in contact with the wall for 1.09 s. Ignore friction and wind resistance. Find the average force she exerts on the wall (which has the same magnitude, but opposite direction, as the force that the wall applies to her). Note that this force has direction, which you should indicate with the sign of your answer. Number -9.72 Unitsarrow_forwardAt a time when mining asteroids has become feasible, astronauts have connected a line between their 3780-kg space tug and a 6940-kg asteroid. They pull on the asteroid with a force of 611 N. Initially the tug and the asteroid are at rest, 571 m apart. How much time does it take for the ship and the asteroid to meet?arrow_forwardA 46.9-kg skater is standing at rest in front of a wall. By pushing against the wall, she propels herself backward with a velocity of -1.61 m/s. Her hands are in contact with the wall for 0.555s. Ignore friction and wind resistance. Find the average force she exerts on the wall (which has the same magnitude, but opposite direction, as the force that the wall applies to her). Note that this force has direction, which you should indicate with the sign of your answer.arrow_forward
- An unfortunate astronaut loses his grip during a spacewalk and finds himself floating away from the space station, carrying only a rope and a bag of tools. First he tries to throw a rope to his fellow astronaut, but the rope is too short. In a last ditch effort, the astronaut throws his bag of tools in the direction of his motion (away from the space station). The astronaut has a mass of 124 kg and the bag of tools has a mass of 16.0 kg. If the astronaut is moving away from the space station at 1.80 m/s initially, what is the minimum final speed of the bag of tools (with respect to the space station) that will keep the astronaut from drifting away forever? Number m/sarrow_forwardA 1.90 kg box is moving to the right with speed 9.00 m/s on a horizontal, frictionless surface. At t = 0 a horizontal force is applied to the box. The force is directed to the left and has magnitude F(t)=( 6.00 N/s^2 )t2 If the force continues to be applied, what is the velocity of the box at 3.50 s?arrow_forwardAn object has a velocity (4.69 m/s)i + (-4.4 m/s)j + (4.73 m/s)k. In a time of 5.5 s its velocity becomes (-2.22 m/s)i + (0.00 m/s)j + (4.73 m/s)k. 1) If the mass of the object is 3.31 kg, what is the magnitude of the net force on the object, in N, during the 5.5 s? Assume the acceleration is constant.arrow_forward
- A 53.8-kg skater is standing at rest in front of a wall. By pushing against the wall she propels herself backward with a velocity of -2.10 m/s. Her hands are in contact with the wall for 0.550 s. Ignore friction and wind resistance. Find the average force she exerts on the wall (which has the same magnitude, but opposite direction, as the force that the wall applies to her). Note that this force has direction, which you should indicate with the sign of your answer. Number i Save for Later Units Attempts: 0 of 3 used Submit Answerarrow_forwardYour mass is 94.9 kg, and the sled s mass is 21.8 kg. The sled is moving by itself on the ice at 5.71 m/s. You parachute vertically down onto the sled, and land gently. What is the sled s velocity with you now on it? 0.54 m/s 1.39 m/s 1.23 m/s 1.07 m/sarrow_forwardA caravan of mass 600 kg is towed by a car of mass 900 kg along a straight horizontal road. The towbar joining the car to the caravan is modelled as a light rod parallel to the road. The total resistance to motion of the car is modelled as having magnitude 300 N. The total resistance to motion of the caravan is modelled as having magnitude 150 N. At a given instant the car and the caravan are moving with speed 20 m/s and acceleration 0.2 m /s². (a) Find the power being developed by the car's engine at this instant. (b) Find the tension in the towbar at this instantarrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning