- #1
Mysteek
- 10
- 0
First post =]
Requesting guidance with this particular problem:
A 1.20 kg object is moving in the x direction at 14.4 m/s. Just 3.31 s later, it is moving at 28.8 m/s at 34.0 degrees to the x axis.
a.) What is the magnitude of the force applied during this time?
b.) What is the direction of the force applied during this time?
Fnet=ma?
I first organized all my givens, that is:
mObject = 1.20kg
vObject = 14.4m/s
t = 3.31s
v2Object = 28.8m/s 34 degrees to x axis
I established a coordinate system so that positive would be ^ and -> , and negative would be the opposites. I then drew the corresponding vectors (14.4m/s and 28.8m/s at the angle).
Then I broke down the angled vector into its x and y components:
v2x = 28.8cos34 = 23.88m/s
v2y = 28.8sin34 = 16.1m/s
Here's where I get uncomfortable with my work:
I know Fnet = ma
So F = 1.2(v/t)
= 1.2(v2-v1 / t)
= 1.2kg((23.88m/s - 14.4m/s) / 3.31s)
= 3.44
I'm aware I completely neglected the y component, and I've been having trouble finding out where to fit it really. I'd love a push in the right direction if someone wouldn't mind - thanks!
Requesting guidance with this particular problem:
Homework Statement
A 1.20 kg object is moving in the x direction at 14.4 m/s. Just 3.31 s later, it is moving at 28.8 m/s at 34.0 degrees to the x axis.
a.) What is the magnitude of the force applied during this time?
b.) What is the direction of the force applied during this time?
Homework Equations
Fnet=ma?
The Attempt at a Solution
I first organized all my givens, that is:
mObject = 1.20kg
vObject = 14.4m/s
t = 3.31s
v2Object = 28.8m/s 34 degrees to x axis
I established a coordinate system so that positive would be ^ and -> , and negative would be the opposites. I then drew the corresponding vectors (14.4m/s and 28.8m/s at the angle).
Then I broke down the angled vector into its x and y components:
v2x = 28.8cos34 = 23.88m/s
v2y = 28.8sin34 = 16.1m/s
Here's where I get uncomfortable with my work:
I know Fnet = ma
So F = 1.2(v/t)
= 1.2(v2-v1 / t)
= 1.2kg((23.88m/s - 14.4m/s) / 3.31s)
= 3.44
I'm aware I completely neglected the y component, and I've been having trouble finding out where to fit it really. I'd love a push in the right direction if someone wouldn't mind - thanks!