# physics

a body thrown vertically upward returns to the earth in 3sec
what was the initial velocity of the body? what height did the body reach?
neglect the resistance of air.
The answer after solving is 14.7m/s and
11m. please tell me how the answer is arrived.

1. 👍 0
2. 👎 0
3. 👁 80
1. Vf = Vo + gt,
a. Vo=Vf - gt = 0 - (-9.8)(3/2) = 14.7m/s.

b. h = Vo*t + 0.5gt^2,
h=14.7*1.5 + 0.5*(-9.8)(1.5)^2 =11.03m.

1. 👍 0
2. 👎 0
posted by Henry
2. Vf=Vi+at
Om/s=Vi+(9.8m/s²)(3s)
Vi=29.4m/s

d=Vit+(0.5)at²
d=29.4m/s(3s)+(0.5)(3s)²
d=88.2m+44.1m
d=132.3m

1. 👍 0
2. 👎 0

## Similar Questions

1. ### physics

a body is thrown vertically upward return to the earth in 3sec. (a)what was the initial velocity of the body (b)what height did the body reach? neglect the resistance of air.

asked by pavatharani on June 14, 2011
2. ### physics

A body is thrown vertically upward from the top of the cliff 50m high. Has the body reaches the ground in 10. What is the initial velocity of body?

asked by Anonymous on August 21, 2010
3. ### physics

A body is thrown vertically upward from the top of the cliff 50m high. Has the body reaches the ground in 10. What is the initial velocity of body?

asked by Anonymous on August 21, 2010
4. ### physics

If a ball is thrown vertically upward with initial velocity of 8 meters per second, what would the speed be when it returns to the starting point with acceleration of 9.81?

asked by Kelli on September 19, 2011
5. ### math

A body is thrown vertically upward from the ground with an initial velocity of 96 ft/sec. Find the maximum height attain by the body

asked by gillian on April 26, 2016
6. ### Physics

A body is thrown vertically upward with initial velocity 9.8m/s what height it will attain ?

asked by Dua Jawaid on June 11, 2014
7. ### Physics

A tennis ball is thrown vertically upward with an initial velocity of +7.0 m/s. What will the ball’s velocity be when it returns to its starting point? The acceleration of gravity is 9.81 m/s^2. Answer in units of m/s

asked by Vanessa on September 21, 2011
8. ### physics

A tennis ball is thrown vertically upward with an initial velocity of +7.5 m/s. What will the ball’s velocity be when it returns to its starting point? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s.

asked by Anonymous on September 25, 2015
9. ### physical science

A tennis ball is thrown vertically upward wih an initial velocity of 8.0m/s. A) What will its speed be wheen it returns to its tarting point? B) How long will it take for it to reach its starting poing?

asked by Taylor on April 16, 2009
10. ### math

An object of mass 100g is thrown vertically upward from a point 60cm above the earths surface with an initial velocity of 150cm/sec. It rises briefly and then falls vertically to the earth, all of which time it is acted on by air

asked by Meitavelo Himufe on March 20, 2015

More Similar Questions