A force f=4i-2j is applied in moving an object along a displacment r=3i+4j then the workdone is

Aparticle with mass 1.81×10−3 kg and a charge of 1.22×10−8 c has, at a given instant, a velocity v⃗ =(3.00×104m/s)j^. what are the magnitude and direction of the particle’s acceleration produced by a uniform magnetic field b⃗ =(1.63t)i^+(0.980t)j^?

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

What kind of simple machine is a catapult?