Posted by **priya** on Sunday, August 8, 2010 at 12:40pm.

im stuck i have no clue where to start, please help me i just know the givens and some claculations.

question: kevin stands on he top of a buiulding and he throws an aboject up into the air at a velocity of 16.0m/s at an angle of 25 degrees to the horizontal. if the building is 75 m tall, how far from the base will the object hit the ground.

given:

vi: 16.o m/s

dy: 75m

dx:?

a=9.8m/s^2

calculated given:vix=6.76m/s,viy=14.5m/s

this is all i know, i have know clue what to do, please help me. Thanks!!

- physics 12 -
**drwls**, Sunday, August 8, 2010 at 4:54pm
The vertical component viy should be LESS than the horizontal component, vix. That is because the launch angle is closer to vertical than horizontal.

Use the equation of motion that contains g and viy to compute the time that it takes for the object to hit the ground (y=0).

y = 75 + viy*t - (g/2)*t^2 = 0

Once you have solved for t (using the positive of the two possible solutions), use that and vix to compute the horizontal location.

X = vix*t

## Answer This Question

## Related Questions

- physics - i need help understanding physics. im failing my class and dont want ...
- Grade 12 Physics - CAN SOMEONE PLEASE HELP ME WITH MY QUESTION I AM REALLY STUCK...
- Math - Check answer PLEASE!! Kevin wants to calculate the value of the ...
- Algebra - Simplify: (x)+(4/x)-(1) --------------divide top by bottom (1/x)-(3/x^...
- speech help - i am giving a speech tomorrow on my persuasive speech on why i ...
- Physics - Kevin stands at the edge of a cliff, holding one ball in each hand. He...
- Algebra - O.k. this is similar to the other one I posted. There is a technique ...
- science - could someone please help me i have to write about the start of life ...
- College Physics - A students stands at the top of a high vertical cliff and ...
- phys - Calculate the total force of the atmosphere acting on the top of a table ...

More Related Questions