(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Three forces acting on an object are given by F1 = ( 1.55 i - 1.90 j ) N, F2 = ( - 5.20 i - 3.15 j ) N, and F3 = ( - 50.0 i + 44.0 j ) N.

(a) What is the direction of the acceleration?

° (from the positive x axis)

(b) What is the mass of the object?

kg

(c) If the object is initially at rest, what is its speed after 16.0 s?

m/s

(d) What are the velocity components of the object after 16.0 s?

( i + j ) m/s

2. Relevant equations

F=ma

3. The attempt at a solution

the acceleration is 3.70 m/s2. i know to get the direction in part (a) i have to use arctan ay/ax but i cant figure out how to get those values. the velocity is 59.2m/s but i dont know how to get the unit vectors.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: 3 Force Vectors

**Physics Forums | Science Articles, Homework Help, Discussion**