Aball attached to a string of 2m is raised to an angle of 38 degrees below the horizontal and then released. a) what is the expected velocity of the ball when it reaches the bottom of its swing, neglecting air resistance?
b) it was measured that the actual velocity was 3.0 m/s. what was the work done by air resistance if the mass of the ball is 0.5 kg?

Julia would be observing a. static electricity was caused by her sweater rubbing against her shirt and transferring electrons. she didn't touch anything metal, so that would cancel out b.she most likely didn't rub her sweater against her hair either, so that cancels out c.she also didn't scoot across the carpet while trying to take her sweater off, that cancels out d.so that leaves a.a. is correct.