Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN: 9781133939146
Author: Katz, Debora M.
Publisher: Cengage Learning
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Chapter 5, Problem 61PQ
To determine
What happen if the freight train having higher acceleration than the passenger train collide each other.
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The diagram below shows an object of mass m= 20kg being acted upon by a force F=50N at an angle of θ=30o. The coefficient of kinetic friction between the object and the surface is 0.100.
a.Draw a Free Body diagram for the object. Be sure to show all forces as well as the reference x,y axis. and Using Newton’s 2nd law, write the force equations for both the x and the y directions. Write these equations in terms of the letters m, F, θ, FN, g, f (little f stands for the friction force).
X-direction: _______________________________________________________________
Y-direction:________________________________________________________________
b.Solve for the Normal Force
c .Use your answer from part b to find the frictional force.
d .Solve for the acceleration of the object.
e.If this object was originally moving at 4 m/s, how fast would it be moving after 8 seconds?
f .How far will…
Block 1 (7.5 kg) is resting on the surface of a table. A hand pushes vertically down on block 1 with a force of 240. N.On a sheet of paper, draw the free body diagram for block 1 using the two-subscript notation from class. After completing the free body diagram, enter below each force and its x & y-components. Remember that the x-component is the "i" component and the y-component is the "j" component.
FORCES on BLOCK 1Weight force on block 1 by Earth: (two-subscript notation)Value = i + j N
Normal force on block 1 by Hand: (two-subscript notation)Value = i + j N
Normal force on block 1 by Surface: (two-subscript notation)Value = i + j N
On his way to class, a student on a skateboard is accelerating on a downhill stretch. Which of the following statements is true? (Select all that apply.)
V The skateboarder's acceleration is perpendicular to the net force.
O The skateboarder is moving in the direction of the net force.
V The skateboarder is subjected to a net external force in the direction of motion.
O The skateboarder's acceleration is in the direction of the net force.
Consider the basic premise of Newton's First Law.
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Chapter 5 Solutions
Physics for Scientists and Engineers: Foundations and Connections
Ch. 5.2 - Because Newtons first law is counterintuitive, it...Ch. 5.2 - Train Collision and Newtons First Law A group of...Ch. 5.3 - Shown in Figure 5.4 are four situations in which a...Ch. 5.3 - A person stands on a spring scale in an elevator...Ch. 5.4 - Prob. 5.5CECh. 5.5 - Prob. 5.6CECh. 5.6 - a. Take a moment to be sure that you understand...Ch. 5.7 - Imagine weighing the same bunch of bananas with...Ch. 5.7 - For all three situations, find the magnitude and...Ch. 5.9 - Prob. 5.10CE
Ch. 5.9 - A child jumping off the monkey bars at a...Ch. 5.9 - Prob. 5.12CECh. 5 - Why is it easier to lift a very large beach ball...Ch. 5 - Prob. 2PQCh. 5 - Imagine pushing two blocks on ice. The light block...Ch. 5 - When Julia Child would cook an omelet, she would...Ch. 5 - Prob. 5PQCh. 5 - Prob. 6PQCh. 5 - Prob. 7PQCh. 5 - Prob. 8PQCh. 5 - Prob. 9PQCh. 5 - Prob. 10PQCh. 5 - Prob. 11PQCh. 5 - You blow a small piece of paper through the air....Ch. 5 - Prob. 13PQCh. 5 - Prob. 14PQCh. 5 - Prob. 15PQCh. 5 - Prob. 16PQCh. 5 - Prob. 17PQCh. 5 - A ball hanging from a light string or rod can be...Ch. 5 - Prob. 19PQCh. 5 - You are riding a luxury bus. In front of you is a...Ch. 5 - Prob. 21PQCh. 5 - A particle with mass m = 4.00 kg accelerates...Ch. 5 - The x and y coordinates of a 4.00-kg particle...Ch. 5 - In the movie Garden State, one of the characters...Ch. 5 - The starship Enterprise has its tractor beam...Ch. 5 - A race car is moving around a circular track at a...Ch. 5 - A particle of mass m1 accelerates at 4.25 m/s2...Ch. 5 - Prob. 28PQCh. 5 - Two forces F1=(62.98i15.80j) N and...Ch. 5 - Three forces F1=(62.98i15.80j) N,...Ch. 5 - A hockey stick pushes a 0.160-kg puck with...Ch. 5 - If the vector components of the position of a...Ch. 5 - If the vector components of the position of a...Ch. 5 - A 15.0-kg object is in free fall near the surface...Ch. 5 - A black widow spider hangs motionless from a web...Ch. 5 - Determine whether each of the following statements...Ch. 5 - You place tomatoes in the pan of a hanging spring...Ch. 5 - Kinetic friction is proportional to the normal...Ch. 5 - A student takes the elevator up to the fourth...Ch. 5 - A sleigh is being pulled horizontally by a train...Ch. 5 - Two blocks are connected by a rope that passes...Ch. 5 - Find an expression for the carts acceleration in...Ch. 5 - A woman uses a rope to pull a block of mass m...Ch. 5 - A student working on a school project modeled a...Ch. 5 - One great form of athletic competition for...Ch. 5 - A heavy crate of mass 50.0 kg is pulled at...Ch. 5 - A block with mass m1 hangs from a rope that is...Ch. 5 - To get in shape, you head to the local gym to...Ch. 5 - A block with mass m1 hangs from a rope that is...Ch. 5 - FIGURE P5.49 Problems 49 and 50. Suppose the...Ch. 5 - Two objects, m1 = 3.00 kg and m2 = 8.50 kg, are...Ch. 5 - A runaway piano starts from rest and slides down a...Ch. 5 - Does the ground need to exert a force on you for...Ch. 5 - A boxer breaks his hand by punching another boxers...Ch. 5 - Prob. 55PQCh. 5 - A textbook rests on a movable wooden plank that is...Ch. 5 - Prob. 57PQCh. 5 - Prob. 58PQCh. 5 - Prob. 59PQCh. 5 - A worker is attempting to lift a 55.0-kg palette...Ch. 5 - Prob. 61PQCh. 5 - A concept map is a visual representation of...Ch. 5 - A 75.0-g arrow, fired at a speed of 110 m/s to the...Ch. 5 - Prob. 64PQCh. 5 - A box with mass m1 = 6.00 kg sliding on a rough...Ch. 5 - Prob. 66PQCh. 5 - A cosmic ray muon with mass m = 1.88 1028 kg...Ch. 5 - Prob. 68PQCh. 5 - Prob. 69PQCh. 5 - A 1.50-kg particle initially at rest and at the...Ch. 5 - A block of ice (m = 15.0 kg) with an attached rope...Ch. 5 - A block of ice (m = 15.0 kg) with an attached rope...Ch. 5 - Prob. 73PQCh. 5 - Starting from rest, a rectangular toy block with...Ch. 5 - When a 1.50-kg dress hangs midway from a taut...Ch. 5 - Jamal and Dayo are lifting a large chest, weighing...Ch. 5 - A heavy chandelier with mass 125 kg is hung by...Ch. 5 - Two children, Raffi and John, sitting on sleds...Ch. 5 - Two boxes with masses m1 = 4.00 kg and m2 = 10.0...Ch. 5 - Two blocks of mass m1 = 1.50 kg and m2 = 5.00 kg...Ch. 5 - An aerial demonstration aircraft dives at an angle...Ch. 5 - A painter sits on a scaffold that is connected to...Ch. 5 - Three crates with masses m1 = 5.45 kg, m2 = 7.88...Ch. 5 - A small block with mass m is set on the top of an...
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- Why is the static coefficient of friction of glass on glass (0.94) higher than the static coefficient of friction of wood on brick (0.60)? Please provide an explanation which will allow me to further understand the concept of friction. Thank you.arrow_forwardIn the figure below, the net external force on the 30-kg mower is stated to be 60 N. Please, note that Fnet is the vector sum of force of the person and force of friction on the mover. Fret a. If the force of friction opposing the motion is 10 N, what is the magnitude of the force F exerted by the person on the mower in Newtons? Hint The magnitude of force F exerted by the person on the mower is equal to N. Enter an integer or decimal number [more..] b. Suppose the mower is moving at 1.5 m/s when the force F is removed. How far in meters will the mower go before stopping? Hint Once the force F is removed, the mower will go 1.125 stopping. x m beforearrow_forwardBlock A is connected to Block B using a rope that passes over a frictionless pulley. The coefficient of static friction between the surface of the table and Block A is 0.60. The mass of Block B is not enough to move Block A. Consider the mass A = 5 kg. find; i.) The tension force in the rope. ii.) The maximum value of mass B (unit should be in kg) to keep the system in equilibrium.arrow_forward
- A hanging chair hangs from a single chain, as shown above. The chair is not moving and the chain is the only thing that holds the chair up. There are no significant forces on the chair aside from the tension in the chain and the weight of the chair. We know that these two forces are equal and opposite. Which of the following correctly explains how we know that these two forces are equal and opposite? Choose all that apply. More than one answer may be correct. O Those two forces form a "third law pair" for the chair. O The chair is not accerlerating. O Compared to the chair, the chain is essentially massless. O Newton's third law. O Newton's second law.arrow_forwardThree blocks A, B, and C stand next to each other as shown in the figure. A force F is applied to push block C directly and sends the blocks accelerating to the right with acceleration of 10 m/s2. Let's assume there is no friction between the blocks and the ground. The mass of A, B, and C are 12.300, 89.200, and 154.100 kg, respectively. What is the force applied on block C by block B (in unit of N)?arrow_forwardConsider the cart on a track below. A pulling force is shown acting to the right. Assume that there is no resistance to motion from the surface (no friction) can be ignored. 0.5N 1kg If the mass of the cart is increased to 2 kg what effect will it have on the acceleration? O The acceleration remains the same in the new scenario as the original. O The acceleration will be greater in the new scenario than the original. O It's not possible to tell from the information provided. O The acceleration will be less in the new scenario than the original.arrow_forward
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