The 215-kg lunar lander is descending onto the moon's surface with a velocity of 4.5 m/s when its retro-engine is fired. If the engine produces a thrust Tfor 5.2s which varies with the time as shown and then cuts off, calculate the velocity of the lander when t = 6.3s assuming that it has not yet landed. Gravitational acceleration at the moon's surface is 1.62 m/s?. The velocity is positive if moving downward, negative if up. 4.5 m/s T.N 748 2.6 5.2 1, Answe: V= m/s

The 215-kg lunar lander is descending onto the moon's surface with a velocity of 4.5 m/s when its retro-engine is fired. If the engine produces a thrust Tfor 5.2s which varies with the time as shown and then cuts off, calculate the velocity of the lander when t = 6.3s assuming that it has not yet landed. Gravitational acceleration at the moon's surface is 1.62 m/s?. The velocity is positive if moving downward, negative if up. 4.5 m/s T.N 748 2.6 5.2 1, Answe: V= m/s

Classical Dynamics of Particles and Systems

5th Edition

ISBN:9780534408961

Author:Stephen T. Thornton, Jerry B. Marion

Publisher:Stephen T. Thornton, Jerry B. Marion

Chapter9: Dynamics Of A System Of Particles

Section: Chapter Questions

Problem 9.62P

See similar textbooks

Similar questions

Check Your Understanding How would the firework display change in deep space, far away from any source of gravity?
Check Your Understanding How does your weight at the top of a tall building compare with that on the first floor? Do you think engineers need to take into account the change in the value of g when designing structural support for a very tall building?
Ahockey puck of mass 322 g is siding due east on a fictionless table with a speed of 150 ms Suddenlys constare force of magnitude 4.03 N and deacted due north is applied to the puck f 2.55s Find the magnitude of the moment | 4pm at the end of the 255-s interval (Express your answer to 2 decimal places, with no unit
One of the first ion engines on a commercial satellite usedXenon as a propellant and could eject the ionized gas at a rateof 3.03 x 1026 kg/s with an exhaust speed of 3.04 x 104 m/s.What instantaneous thrust could the engine provide?
A boy coasts down a hill on a sled, reaching a level surface atthe bottom with a speed of 7.00 m/s. If the coefficient of frictionbetween the sled’s runners and the snow is 0.050 0 andthe boy and sled together weigh 600. N, how far does the sledtravel on the level surface beforecoming to rest?
A 0.35 kg croquet ball is initially at rest on the grass.When the ball is struck by a mallet , the aveage foce exerted on it is 250 N . If the ball's speed after being struct is 3.2 m/s , how long was the mallet in contact with the ball?
In a study conducted by a University of Illinois researcher, the football team at Unity High School in Tolono, IL was equipped for an entire season with helmets containing accelerometers. Information about every impact in practice and in games was sent to a computer present on the sidelines. The study found that the average force on a top of the head impact was 1770 N and endured for 7.78 milliseconds. Using a head mass of 5.20 kg and presuming the head to be a free body, determine the velocity change experienced in such an impact. with solution and answer, thank you
In a study conducted by a University of Illinois researcher, the football team at Unity High School in Tolono, IL was equipped for an entire season with helmets containing accelerometers. Information about every impact in practice and in games was sent to a computer present on the sidelines. The study found that the average force on a top of the head impact was 1770 N and endured for 7.78 milliseconds. Using a head mass of 5.20 kg and presuming the head to be a free body, determine the velocity change experienced in such an impact.
If a B g bullet is fired out of a 5 kg rifle at the speed of 95 m/s What is the recoil speed of the rifle? When the bullet hits the target it takes 0.35 s to stop. What force does the bullet apply on the target?
Identical twins, each with mass 55.0 kg, are on ice skates andat rest on a frozen lake, which may be taken as frictionless.Twin A is carrying a backpack of mass 12.0 kg. She throws ithorizontally at 3.00 m/s to Twin B. Neglecting any gravityeffects, what are the subsequent speeds of Twin A and Twin B?
Calculate the acceleration of a 2000kg single engine airlane just before take off when the thrust of the engine is 500N?
The mass of a particular skateboard plus its rider is ms=78.6kg, and the skateboarder is holding a book with mass mb=3.07kg. Initially at rest, the skateboarder tosses the textbook with a velocity of vb=2.74m/s at an angle θ=24.3∘ above the horizontal, and the book is caught by a friend. Calculate the magnitude, in meters per second, of the velocity of the student. What is the magnitude, in newton seconds, of the momentum, pE, which was transferred to the the Earth during the time the book was being thrown?