A "doomsday" asteroid with a mass of 1.0 × 1010 kg is hurtling through space. Unless the asteroid's speed is changed by about 0.25 cm/s, it will collide with Earth and cause tremendous damage. Researchers suggest that a small "space tug" sent to the asteroid's surface could exert a gentle constant force of 2.4 N . For how long must this force act?

A "doomsday" asteroid with a mass of 1.0 × 1010 kg is hurtling through space. Unless the asteroid's speed is changed by about 0.25 cm/s, it will collide with Earth and cause tremendous damage. Researchers suggest that a small "space tug" sent to the asteroid's surface could exert a gentle constant force of 2.4 N . For how long must this force act?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter5: Newton's Laws Of Motion

Section: Chapter Questions

Problem 25PQ: The starship Enterprise has its tractor beam locked onto some valuable debris and is trying to pull...

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The starship Enterprise has its tractor beam locked onto some valuable debris and is trying to pull it toward the ship. A Klingon battle cruiser and a Romulan warbird are also trying to recover the item by pulling the debris with their tractor beams as shown in Figure P5.25. a. Given the following magnitudes of the tractor beam forces, find the net force experienced by the debris: FEnt = 7.59 106 N, FRom = 2.53 106 N, and FKling = 8.97 105 N. b. If the debris has a mass of 2549 kg, what is the net acceleration of the debris? FIGURE P5.25
Scientists 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?
The weight of a mass on Mercury, where the acceleration due to gravity is 3.61 m/s2, is 1235 N. What would be the weight of the same mass on the Moon, where the acceleration due to gravity is 1.60 m/s2?
An astronaut moves in space with a constant speed. If he is far from the influence of gravity of any star or planet, what is the minimum force required in order for him to keep on moving? a) force equal to its weight b) force equal to its mass c) force depending on its speed d) zero
Given a mass of 2.00 kg let g= the acceleration due to gravity on earth in si units . Which of these expressions will yield the weight of the mass on earth in so units? a. 0.25g b. 0.20 g c. 2 g d. 4 g e. 0
On the surface of the planet Neptune, the acceleration of gravity is 11.15 m/s2. If a meteoroid traveling towards the surface of Neptune has a mass of 7480 kg, then what is the weight of this object when it reaches the surface of Neptune? 7480 N 49,600 N 73,400 N 83,400 N
4 A stone has a weight of 40 N on the Mars, where g = 3.7 m/s2. The mass of the stone is ______________. a. 4.08 kg b. 10.81 kg c. 40kg d. 148 kg
An object weights 7840 N (Newton) on a planet where the acceleration due to gravity is twenty (20) times greater than that of Earth. What would be the mass of this object? A.) 80 kg B.) 40 kg C.) 19.6 kg D.) 98 kg
A 6.38 × 103-kg lunar landing craft is about to touch down on the surface of the moon, where the acceleration due to gravity is 1.60 m/s2. At an altitude of 264 m the craft's downward velocity is 26.9 m/s. To slow down the craft, a retrorocket is firing to provide an upward thrust. Assuming the descent is vertical, find the magnitude of the thrust needed to reduce the velocity to zero at the instant when the craft touches the lunar surface.
A lunar excursion module weighs weights 14.7 KN on earth where g-9.75 m/s². What will be its weight on the surface of the moon where gm=1.7 m/s². On the surface of the moon, what will be the force required to accelerate the module at 10m/s²?
The SI unit of G, the universal gravitation constant is ______________. A) N m2 kg2 B) N m2 kg-2 C) N m-2 kg-2 D) N m-2 kg2
A 2500 kilogram truck is moving initially with a velocity of 10.00 meters per second. To change its velocity from 10.00 meters per second to 20.00 meters per second in a duration of 2.00 seconds, how much Force must be applied? 7500 N 12500 N 14700 N 3750 N