Birds of a Feather

Birds of a Feather 6) If the goose, freed from the extra baggage of the robin, increases its speed Record the correct answer on the [who knows, maybe it just wants to get answer sheet. away from the little pest], taking 5.5 seconds to add 7.4 m/s to its velocity, 1) If a robin, migrating southward in the what is its acceleration? autumn, increases her speed in order to a) 7.4 m/s keep up with the rest of the herd, what b) 1.3 m/s2 would her acceleration be if her speed c) 0.74 m/s2 went from 2.5 m/s to 4.3 m/s in 3.1s? a) 10.8 m2/s2 7) If the robin recovers from its fall and b) 0.58 m/s coasts toward the ground, lands in a tree, c) 0.58 m/s2 and takes a breather, what is its final acceleration? 2) If the robin has a mass of 470 g, how a) 39 m/s2 much force is required to accomplish b) 0 m/s2 this? c) 9.8 m/s2 a) 4600 N b) 270 N 8) If the robin leaves the tree and over c) 0.27 N the course of 19 seconds increases its horizontal speed to 3.7 m/s, what would 3) If the robin grows tired and needs to its acceleration be? rest on a passing goose, once it lands on a) 5.1 m/s2 the goose's back, how much force will it b) 0.19 m/s2 be exerting on the goose? c) 0 m/s2 a) 4600 N b) 270 N 9) How much force would the robin c) 810 N need to produce in order to achieve this acceleration? 4) If the goose weighs 39N, what is its a) 0.089 N mass? b) 89 N a) 39 N c) 2500 N b) 4.0 kg c) 380 kg 10) Traveling at 3.7 m/s, it takes 5.4 minutes for the robin to regain its place 5) If the robin's presence causes the in its herd. How far did it need to travel goose to stumble in its flight and causes alone before it caught up? the robin to tumble toward the ground, if a) 1200 m the goose is flying 1.1 miles above the b) 14 m ground, what will the robin's c) 87 m acceleration be at the point halfway between the ground and the goose? a) 39 m/s2 b) 0 m/s2 c) 9.8 m/s2