(a) a force f = (3xî + 4yĵ), where f is in newtons and x and y are in meters, acts on an object as the object moves in the x-direction from the origin to x = 5.18 m. find the work w = f · dr done by the force on the object (in j). j (b) what if? find the work w = f · dr done by the force on the object (in j) if it moves from the origin to (5.18 m, 5.18 m) along a straight-line path making an angle of 45.0° with the positive x-axis. j is the work done by this force dependent on the path taken between the initial and final points? dependent independent

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 ability to make things happen is also called a. heat b. force c. matter d. energy

Why does gravity have a lesser than grater effect on higher altitudes?