A woman exerts a constant horizontal force on a large box. A…

A woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at a constant speed “vo”. If the woman doubles the constant horizontal force that she exerts on the box to push it on the same horizontal floor, the box then moves:

A rocket drifts sideways in outer space from point “a” to po…

A rocket drifts sideways in outer space from point “a” to point “b” as shown below. The rocket is subject to no outside forces. Starting at position “b”, the rocket’s engine is turned on and produces a constant thrust (force on the rocket) at right angles to the line “ab”. The constant thrust is maintained until the rocket reaches a point “c” in space. Fig21.jpg As the rocket moves from position”b” to position “c” its speed is:

A bowling ball accidentally falls out of the cargo bay of an…

A bowling ball accidentally falls out of the cargo bay of an airliner as it flies along in a horizontal direction. As observed by a person standing on the ground and viewing the plane as in the figure at right, which path would the bowling ball most closely follow after leaving the airplane? Fig14.jpg

In the figure below, student “a” has a mass of 95 kg and stu…

In the figure below, student “a” has a mass of 95 kg and student “b” has a mass of 77 kg. They sit in identical office chairs facing each other. Student “a” places his bare feet on the knees of student “b”, as shown. Student “a” then suddenly pushes outward with his feet, causing both chairs to move. Fig28.jpg During the push and while the students are still touching one another:

The accompanying figure shows a frictionless channel in the…

The accompanying figure shows a frictionless channel in the shape of a segment of a circle with center at “O”. The channel has been anchored to a frictionless horizontal table top. You are looking down at the table. Forces exerted by the air are negligible. A ball is shot at high speed into the channel at “p” and exits at “r.” Fig6.jpg Which path in the figure at right would the ball most closely follow after it exits the channel at “r” and moves across the frictionless table top?