Physics, 06.01.2020 04:31 XxrazorxX11
A1.14x10^4 kg lunar landing craft is about to touch down on he surface of the moon, where the acceleration due to gravity is 1.6 m/s^2. at an altitude of 165m the craft's downward velocity is 18.0m/s. to slow down the craft, a retrorocket is firing to provide an upward thrust. assuming the decent 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.
Answers: 1
Physics, 22.06.2019 00:00, cchsemily7210
A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?
Answers: 1
Physics, 22.06.2019 08:00, plshelpme53
A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n
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Physics, 22.06.2019 14:30, chelseayazzie16
What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?
Answers: 1
Physics, 22.06.2019 15:10, maudiejane
An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?
Answers: 2
A1.14x10^4 kg lunar landing craft is about to touch down on he surface of the moon, where the accele...
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