Q: A bike is hanging from a hook in a garage. Consider
A bike is hanging from a hook in a garage. Consider the following forces: (1) the force of Earth pulling down on the bike, (2) the force of the bike pulling up on Earth, and (3) the force of the hook...
See AnswerQ: A box containing a new TV weighs 350 N. Phineas is
A box containing a new TV weighs 350 N. Phineas is pushing horizontally on it with a force of 150 N, but it doesn't budge. (a) Identify all the forces acting on the crate. Describe each as: (type of...
See AnswerQ: You want to hang a 15 N picture as in the figure
You want to hang a 15 N picture as in the figure (a) using some very fine twine that will break with more than 12 N of tension. Can you do this? What if you have it as illustrated in Figure (b)?
See AnswerQ: You grab a book and give it a quick push across the
You grab a book and give it a quick push across the top of a horizontal table. After a short push, the book slides across the table, and because of friction, comes to a stop. (a) Draw an FBD of the b...
See AnswerQ: When you hold up a 50 N object in your hand,
When you hold up a 50 N object in your hand, with your forearm horizontal and your palm up, the upward force exerted by your biceps is much larger than 50 N—perhaps as much as 5000 N...
See AnswerQ: The coefficient of static friction between block A and a horizontal floor
The coefficient of static friction between block A and a horizontal floor is 0.45, and the coefficient of static friction between block B and the floor is 0.30. The mass of each block is 2.0 kg, and t...
See AnswerQ: While trying to decide where to hang a framed picture, you
While trying to decide where to hang a framed picture, you press it against the wall to keep it from falling. The picture weighs 5.0 N, and you press against the flat frame with a force of 6.0 N at an...
See AnswerQ: Tamar wants to cut down a dead poplar tree with her chain
Tamar wants to cut down a dead poplar tree with her chain saw, but she does not want it to fall onto the nearby gazebo. Yoojin, a physicist, suggests they tie a rope taut from the poplar to an oak tre...
See AnswerQ: A toy freight train consists of an engine and three identical cars
A toy freight train consists of an engine and three identical cars. The train is moving to the right at constant speed along a straight, level track. Three spring scales are used to connect the cars a...
See AnswerQ: A skydiver, who weighs 650 N, is falling at a
A skydiver, who weighs 650 N, is falling at a constant speed with his parachute open. Consider the apparatus that connects the parachute to the skydiver to be part of the parachute. The parachute pull...
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