Lizzy Cole is lounging on a raft (initially at rest) in the middle of her pool. She is minding her own business, reading her .55 kg physics book, when Trace thought it would be funny to dump a bucket of water on her. Lizzy, attempting some kind of revenge, chucks her physics book at Trace with a velocity of 3.7 m/s. a. If the raft and Lizzy weigh 620 N, at what velocity does Lizzy and her raft move immediately after the book is thrown? (Note: Lizzy and the raft will move in the opposite direction of the book.)
b. If Lizzy is 2.4 m from the edge of the pool how long does Trace have to run before she reaches the edge?

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)

The solid that is formed and usually sinks to the bottom of a solution is the

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.