my college hive icon mycollegehive
Groups
My College Hive notifiction icon Questions
Connect / Friends
Tags
Quiz
Books
A body is thrown up vertically with initial velocity 50m/s c...
Physics
up
0
down

A body is thrown up vertically with initial velocity 50m/s calculate

i)time to reach maximum height

ii) maximum height reach 

iii)the total time the body spent in the air

iv)the velocity with which the ball hit the ground

v)kinetic energy after 4s

54 views
Share Follow
Ana
Asked by Anarep:53
Ghana
04 October 2020

Comments





1 answer(s)


james_mark
James_mark answeredrep:694
School not set Nigeria
05 October 2020
up
0
down

I) from first equation of motion,  v = u + at

The above equation can be written as:

V = u - gt [because the ball travels against gravity]

V = 0

0 = u - gt

U = gt

g = 10m/s

50 = 10t

t = 50/10

t = 5 seconds

 

Ii) from third equation of motion, v2 = u2 + 2as.

The above equation can be written as:

V2 = u2 - 2gH [because the ball travels against gravity]

V = 0

0 = 502 - 2(10)H

2500 = 20H

H = 2500/20

H = 125m

 

Iii) total time spent in air = 2t

t = time to reach maximum height = 5

Total time spent in air = 2(5)

= 10 seconds

 

IV) from third equation of motion, v2 = u2 + 2as.

The above equation can be written as:

V2 = u2 + 2gH [because the ball travels with gravity]

U = 0

V2 = 2(10)(125)

V2 = 2500

V = 50m/s

Share
Comments
dp
Ana,
Thanks a lot please you left the v
1 likes, 0 dislikes
dp
james_mark
No... i don't know V
1 likes, 0 dislikes
dp
Ana,
Okay I appreciate all your efforts.God bless u
1 likes, 0 dislikes

View all 3 comments




Groups


Your Answer

How to insert math formulas/equations

my college hive loader icon



Related Tags

Physics

6 followers

121 questions