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 33 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
Excellent

yeungji

  • Member
  • Posts: 319
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

J. M. W. Turner, Rain, Steam, and Speed—The Great Western Railway. J. M. W. Turner, Rain, Steam, and Speed—The Great Western Railway.
A steady needle reading that rises 2 or 3 inches Hg when the engine speed is increased slightly ... A steady needle reading that rises 2 or 3 inches Hg when the engine speed is increased slightly ...
Vertical and Horizontal Changes in Pressure Vertical and Horizontal Changes in Pressure
Thermodynamic Diagrams and Vertical Temperature Profiles Thermodynamic Diagrams and Vertical Temperature Profiles
A 4.0-kg block slides down a 35 incline at a constant speed when a 16-N force is applied acting ... A 4.0-kg block slides down a 35 incline at a constant speed when a 16-N force is applied acting ...
A pool player is attempting a fancy shot. He hits the cue ball giving it a speed of 5.57 m/s ... A pool player is attempting a fancy shot. He hits the cue ball giving it a speed of 5.57 m/s ...
Video: Functional zones in a mitochondrion

For a complete list of videos, visit our video library