Author Question: Calculate velocity of a vertical projectile with only time? (Read 1512 times)

Jesse_J

  • Sr. Member
  • ****
  • Posts: 282
So for my physics class, one assignment was shown as a video. A ball is shot straight in the air from a launcher, it take a total of 1.37 seconds from the point of being shot till it returns to it's starting place.

The only other info is that the launcher is sitting on a 1 metre tall table.

I need to know the velocity of the projectile, and can't find anything on how to do it anywhere.

Thanks!



Hawke

  • Hero Member
  • *****
  • Posts: 679
v = u+at
v = 0 at max height, t = (1.37/2) at max height , a = -9.81 , u =?
0 = u -9.81 x (1.37/2)
u = 9.81 x (1.37/2)
u = 6.72m/s



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Jones

  • Full Member
  • ***
  • Posts: 145
If it takes 1.3s. to return to its start point (1m. above ground), it takes 0.65s. to reach maximum height. So you need to find that height.
Height = 1/2 (t^2 x g), = 2.07025m.
Since you have table height, one must assume you need velocity at GROUND. So, add 1 metre.
Velocity = sqrt. (2gh), = 7.7574m/sec.

9.8 used as g.



 

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

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?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

For a complete list of videos, visit our video library