Aforce f~ = fx ˆı + fy ˆ acts on a particle that
undergoes a displacement of ~s = sx ˆı + sy ˆ
where fx = 7 n, fy = −1 n, sx = 3 m, and
sy = 3 m.
find the work done by the force on the
particle.
answer in units of j.

find the angle between f~ and ~s.
answer in units of ◦

How would you place two electrons on a sphere of radius r so that the electrostatic potential energy is minimized. how would you place three electrons to solve the same problem.

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?