This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A 958-N rocket is coming in for a vertical landing. It starts with a downward speed of 25 m/s and ... (Read 25 times)

imanialler

  • Hero Member
  • *****
  • Posts: 539
on: Jul 29, 2018
A 958-N rocket is coming in for a vertical landing. It starts with a downward speed of 25 m/s and must reduce its speed to 0 m/s in 8.0 s for the final landing.
 
  (a) During this landing maneuver, what must be the thrust due to the rocket's engines?
  (b) What must be the direction of the engine thrust force?

Question 2

A board that is 20.0 cm wide, 5.00 cm thick, and 3.00 m long has a density 350 kg/m3. The board is floating partially submerged in water of density 1000 kg/m3. What fraction of the volume of the board is above the surface of the water?
 
  A) 0.350
  B) 0.650
  C) zero
  D) 0.200
  E) The answer depends on which edge of the board is vertical.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

phuda

  • Sr. Member
  • ****
  • Posts: 348
Reply #1 on: Jul 29, 2018
Answer to Question 1

(a) 1300 N (b) upward

Answer to Question 2

B


imanialler

  • Member
  • Posts: 539
Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

nanny

  • Member
  • Posts: 313
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.

Rocket Physics Rocket Physics
The Speed of Light Is Constant The Speed of Light Is Constant
An IAC controls idle speed by controlling the amount of air that passes around the throttle plate. ... An IAC controls idle speed by controlling the amount of air that passes around the throttle plate. ...
Vertical Structure of the Atmosphere Vertical Structure of the Atmosphere
Stretch the flexor muscles with hyperextension at the wrist. Hold the forearm vertical with one ... Stretch the flexor muscles with hyperextension at the wrist. Hold the forearm vertical with one ...
Speed of Light in Different Mediums Speed of Light in Different Mediums
Video: Transcription - Introns and exons

For a complete list of videos, visit our video library