Match the new centripetal acceleration with the change that occurs.

a. doubled f. one third b. tripled g. one fourth c. quadrupled h. one ninth d. nine times i. unchanged e. halved

____ 134. The velocity doubles ____ 135. The velocity is cut in half ____ 136. The radius is cut in half ____ 137. The radius doubles ____ 138. The mass triples ____ 139. The radius triples

Any phrase/term will be used once.

a. electric current f. electrostatics b. electric field g. parallel circuit c. battery h. series circuit d. electric circuit e. resistance

____ 140. a flow of charged particles ____ 141. a type of circuit in which there is only a single current path ____ 142. a type of circuit in which there are several current paths ____ 143. the study of electric charges that can be collected and held in place ____ 144. the field that exists around any charged object ____ 145. a device that converts chemical energy to electric energy ____ 146. a closed loop or pathway that allows electric charges to flow ____ 147. a material through which a charge will not move easily ____ 148. a property that determines how much current will flow

Short AnswerAnswer in 2 sentences

150. How is displacement different from distance? Give examples. Under what conditions can an object travel a certain distance and yet its resultant displacement be zero?

151. How is velocity different from speed? Give examples. Under what conditions can an object travel with a certain speed and yet its velocity is zero?

152. With a short paragraph explaining what acceleration is and why a car is accelerating as it rounds a corner.

155. What is meant by the statement "the vertical and horizontal motions of a projectile are independent"?

158. Explain two ways a heavy truck and a person on a skateboard can have the same momentum.

161. If a car going around a circular track and hits a patch of ice, what will happen to the car's motion?

163. An object in uniform circular motion moves at a constant speed around a circle with a fixed radius. Why is the object said to be accelerating though it has a constant speed?

176.A ball is thrown straight up. At what position is the kinetic energy at its maximum? At what position is the gravitational potential energy at its maximum?

Problem

177. Freddy tries to track Nancy's escape. He drove at 28.2 m/s east for 3 hours to get to Elm Street, but of course, she wasn't there. So Freddy turned around and drove like a maniac at 35.9 m/s west for 2 hours. a. What was Freddy's average speed? b. What was Freddy's average velocity?

188. A 58 kg elevator accelerates up at 1.9 m/s². What is the force of tension?

191. A 1950 kg rocket consisting of two stages is traveling to the right at a velocity of 245 m/s. An explosion occurs to separate the two parts and the larger 1250 kg section moves to the right at 171 m/s. What is the velocity of the smaller section?

194. An older man was raging, raging against the dying of the light and decided to work out his frustrations. It took him 5.5 s to lift his 90 kg body 0.72 m off the ground for ten reps. How much power did he exert for that first lift?

200. Spider-man grabs one of the Infinity Stones with his webbing 2.8 m long. He swings it around and in 3.37 s it completes 2

revolutions. What is the Stone's centripetal acceleration?

201. Groot grabs Proxima Midnight before she can attack Rocket. He stretches his arm to 8.7 m long and spins her around with a 148 N force. If she has a mass of 218 kg, how long will it take for Groot to spin her 20 revolutions?