« previous next »

Author Question: A projectile is fired from the ground at an angle of 30 degrees above the horizontal,? (Read 944 times)

Hawke

  • Hero Member
  • *****
  • Posts: 679
on: Jun 23, 2013
and it lands 150 meters away. Find (a) the initial velocity of the projectile and (b) the maximum height it reaches.


coco

  • Hero Member
  • *****
  • Posts: 739
Reply #1 on: Jun 23, 2013
Use the following equations:

Hmax = (v0^2*sin^2(theta))/2*g

R = range = (vo^2*sin(2*(theta)))/g

since the range is given, we can use it to find the initial velocity:

150*9.8 = vo^2*.866  so  vo^2 = 1697.46  and v0 = 41.2 m/s

Now use v0 to find the max height:

Hmax = 1697.46*.25/19.6 = 21.65 m


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Hawke

  • Hero Member
  • *****
  • Posts: 679
Reply #2 on: Jul 3, 2013
Thanks ;) It was right.


« previous next »
 

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Ground Pine Ground Pine
Barrel-vaulted gallery, ground floor of the Colosseum, Rome. Barrel-vaulted gallery, ground floor of the Colosseum, Rome.
Figure and Ground Figure and Ground
Chloroform has a boiling point of 61.1 degrees C and dichloromethane has a boiling point of 40 ... Chloroform has a boiling point of 61.1 degrees C and dichloromethane has a boiling point of 40 ...
Video: Lipid catabolism - lipolysis and beta oxidation and oxidation of fatty acids

For a complete list of videos, visit our video library