« previous next »

Author Question: In space there is nothing for the rocket to push against so how does it accelerate? What will be ... (Read 50 times)

DelorasTo

  • Hero Member
  • *****
  • Posts: 548
on: Jul 29, 2018
In space there is nothing for the rocket to push against so how does it accelerate?
 
  What will be an ideal response?

Question 2

A ball is thrown straight up with a speed of 30 m/s. (a.) How long does it take the ball to reach the maximum height? (b.) What is the maximum height reached by the ball? (c.) What is its speed after 4.2 s?
 
  What will be an ideal response?


chevyboi1976

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 29, 2018
Answer to Question 1

In terms of forces, the rocket pushes the exhaust gases back and they in turn (action-reaction) push the rocket forward. In terms of momentum, in order to conserve momentum since the exhaust gases acquire negative momentum (moving backwards) the rocket acquires positive momentum (increasing velocity forward).

Answer to Question 2

(a.) 3.1 s
(b.) 46 m
(c.) 11 m/s


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Because of the hazards of a vacuum, astronauts must wear a pressurized space suit while outside thei Because of the hazards of a vacuum, astronauts must wear a pressurized space suit while outside thei
Russian federation stamp illustrating Yuri Gagarin, first human in space Russian federation stamp illustrating Yuri Gagarin, first human in space
Lunokhod 1 (lit. moonwalker), the first successful space rover. Lunokhod 1 (lit. moonwalker), the first successful space rover.
Human Memorabilia in Space Human Memorabilia in Space
Umberto Boccioni, Development of a Bottle in Space. Umberto Boccioni, Development of a Bottle in Space.
With the vehicle raised one foot (30 cm) off the ground, push down on the vehicle to check if it ... With the vehicle raised one foot (30 cm) off the ground, push down on the vehicle to check if it ...
Video: Rena arc construction

For a complete list of videos, visit our video library