- #1

- 81

- 0

What would the equation be for this question?

I know that:

Height: 30.0m

Gravity: 9.81m/s

I'm not quite sure what else I need to figure this out? thank! :)

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter Brittykitty
- Start date

In summary, the object has a height of 30.0 m and is affected by gravity with a value of 9.81m/s. To find its initial velocity, you can use the equation for conservation of energy or the kinematic equation for objects in motion with constant acceleration. At the highest point of 30.0 m, the velocity is 0.

- #1

- 81

- 0

What would the equation be for this question?

I know that:

Height: 30.0m

Gravity: 9.81m/s

I'm not quite sure what else I need to figure this out? thank! :)

Physics news on Phys.org

- #2

- 81

- 0

Is this a trick question where its 0m/s?

- #3

Science Advisor

Homework Helper

- 1,995

- 7

E = 1/2mv^2+mgh

Alternatively, you could use the equation of motion for the object. You know it has a constant acceleration g downwards.

- #4

- 81

- 0

E=1/2 (230kg)(0.02ms) ^2 + (230kg)(9.81m/s)(32m)

0.092 + 77201.6 = 77201 ?

- #5

- 81

- 0

oops i mean

5.43 + 72201.6 = 72207.03

5.43 + 72201.6 = 72207.03

- #6

Science Advisor

Homework Helper

- 1,995

- 7

You haven't been given the mass of the object, but the answer will be independent of the objects mass anyway.

You have two special points in the objects trajectory which are important to your question. Which are those and what is the expression for the energy at those points?

- #7

- 81

- 0

gravity, height and time?

- #8

- 8

- 0

- #9

- 754

- 1

http://www.physicsclassroom.com/class/1dkin/u1l6a.cfm

That should lead you in the right direction

Share:

- Replies
- 13

- Views
- 577

- Replies
- 3

- Views
- 883

- Replies
- 15

- Views
- 771

- Replies
- 62

- Views
- 3K

- Replies
- 3

- Views
- 508

- Replies
- 2

- Views
- 560

- Replies
- 2

- Views
- 786

- Replies
- 5

- Views
- 3K

- Replies
- 11

- Views
- 1K

- Replies
- 6

- Views
- 989