Q: Juan is helping his mother rearrange the living room furniture. Juan
Juan is helping his mother rearrange the living room furniture. Juan pushes on the armchair with a force of 30 N directed at an angle of 25° above a horizontal line while his mother pushes with a forc...
See AnswerQ: 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 ho...
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 tire swing hangs at a constant 12° angle to the
A tire swing hangs at a constant 12° angle to the vertical when a stiff breeze is blowing. In terms of the tire's weight W, (a) what is the magnitude of the horizontal force exerted on the tire by th...
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