Author Question: A projectile is shot from the edge of a cliff 145m above ground level with an initial speed of 60.0m/s at an? (Read 845 times)

camila

  • Hero Member
  • *****
  • Posts: 705
angle of 43 degrees with the horizontal.
a)Determine the time taken by the projectile to hit ground level
b)Determine the range X of the projectile as measured from the base of the cliff.
c)Find the maximum height above the ground reached by the projectile
d)Find the total velocity of the projectile at the maximum height above the ground.



TI

  • Sr. Member
  • ****
  • Posts: 434

Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Hawke

  • Hero Member
  • *****
  • Posts: 679
list your varibles

vx = 60 * cos 43 m/s
vy = 60 * sin 43 m/s
s0 = 145 m

a)
first figure the time it takes to reach the apex.  at the apex vy = 0, therefore we know vf = vi + a*t and in vertical direction
0 = vy - g*t1

t1 = vy/g

figure the height of the projectile
from s = s0 + v0*t + 1/2at^2 in the vertical direction we get the following

s = s0 + vy*t - 1/2gt^2 (you know all the variables using t1 for t)

know that we know that s figure out how long it takes for it to reach the ground.  at the apex vy = 0 so we know
0 = s + 0 - 1/2gt2^2

t2 = sqrt (2*s/g)   (s was found a step earlier)

the total time it takes T = t1 + t2

b) range = T * vx

c) you already found that in part a)

d) at the max height the vertical component of the velocity is 0 so all you are left with is vh.



 

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

For a complete list of videos, visit our video library