Aroller coaster will accelerate its riders from rest to 33.5m/s in 4.00 seconds. (a) what is the magnitude of the average acceleration of a rider? (b) what is the average net force on a 45.0 kg rider during these 4.00 seconds?

Acurve connects the data points that are plotted. (physical science chapter 11 motion)

You carry a 7.0-kg bag of groceries 1.2 m above the ground at constant speed across a 2.7m room. how much work do you do on the bag in the process? (a) 157j (b) 0.00j (c) 185j (d) 82j

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)