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

A particle moving in the xy plane undergoes a displacement ⃗s = (sx ˆi + sy ˆj), with sx = 1.74 m, sy = 4.3 m, while a constant force

F⃗ = (Fxˆi+Fyˆj), with Fx = 5.1 N, Fy = 1.95 N, acts on the particle.

Calculate the magnitude of the displacement.

Answer in units of m.

Find the magnitude of the force. Answer in units of N.

Calculate the work done by F⃗ . Answer in units of J.

Calculate the angle between F⃗ and ⃗s. Answer in units of degrees.

2. Relevant equations

3. The attempt at a solution

i took the dot product of the two thinking i would get the magnitude of the displacement. im lost as to why it is incorrect?

1.74*5.1 + 4.3*1.95 = 17.259

**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!

# Force acts on a particle

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