University Physics Volume 1

18th Edition

ISBN: 9781938168277

Author: William Moebs, Samuel J. Ling, Jeff Sanny

Publisher: OpenStax - Rice University

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Question

A cannonball has just been shot out of a cannon aimed 45∘ above the horizontal rightward direction. Drag forces cannot be neglected.

Which way does drag point? I thought it points opposite of the direction of the motion.

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1. Draw complete, clearly labeled free-body diagrams. All unknown support reactions should be clearly labeled with a variable name. All known values such as weight or applied forces should be clearly labeled with their known values.
Don't need to show equilibrium equations, I just need free-body diagrams. Only solve this text question, not the questions in image.

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A 10.0 kg block is connected to a light, non-stretchable string to a 6.30 kg mass, which is hanging over the edge of a frictionless table.
a) Draw a free body diagram and label the coordinate systems for each block.
b) Calculate the acceleration of the system when the blocks are released.
c) Give the magnitude and direction of the net force on each block.
5.d) Calculate the acceleration for the same system with the table replaced by a ramp with an angle of 27.0°, with the 10.0 kg block on the ramp and the 6.30 kg block hanging.

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A particle of mass m is released on the side of a semicircular track that points downward. The radius of the semicircular track is R. Using Newton’s second law in polar coordinates, determine how long it will take the particle to come back to the point of release.

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One day, you are driving your car down the highway, and you notice that you are driving well over the speed limit. You apply the brakes of the carapplying a variable stopping force, until the car slows down to a rea sonable speed of 22.4 m/s (50 mph)A computer plots the force versus time for the vehicle and then measures the area under the curve. It is found that the area is - 18.950N . The total breaking time was 5.4 s. Given that the combined mass of you and your car 1sm = 1200 kg how fast were you moving before applying the breaks? What is the average force applied by the road to the car during breaking? (Note: 1Ns=1kg* m/s)

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I need help with this physics problem and I don’t know what the free body diagram would look like for this problem

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I need help with this question. Can you draw a simple free body diagram if possible too?
I will rate thank you!

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What is the difference between 2D Force and 3D Force systems? Explain in no more than 50 words.

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Consider a bow and arrow. Suppose the bow is held vertically, and the string is drawn back from its midpoint so the arrow is horizontal. Each half of the string makes an angle θ with the vertical, as shown in the diagram. A horizontal force with magnitude F is applied to the tail of the arrow, and the system is motionless.
Write an expression for the tension, T, in the string.

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The two tug boats pull the oil rig to travel in the direction shown in calm water. (See left directed arrow). Tug A pulls with a force of 30 kN directed at the angle alpha of 47 deg and Tug B pulls at the angle beta of 36 deg. Determine the pull force of Tug B so the oil rig travels in the direction of the x axis. Determine the force of Tug B in kN.
The oil rig is subjected to the towing forces described in P5 and travels in the direction shown at a constant velocity of 0.9 km/hr when tugs. Determine the 'drag' force exerted by the water on the oil rig in kN.")

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Dynamics
A 20 kg block rests on an inclined plane. The plane makes an angle of 25 degrees with the horizontal, and the coefficient of friction between the block and the plane is 0.13. The 20 kg block is tied to a second block (mass=38 kg) which hangs over the end of the inclined plane after the rope passes over an ideal pulley. What is the acceleration of each of the two blocks, and what is the tension in the rope?

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1 An ice cube is placed on top of an overturned sphericalbowl of radius r, as indicated in Figure 8–30. If the ice cube slidesdownward from rest at the top of the bowl, at what angle doesit separate from the bowl? In other words, at what angle doesthe normal force between the ice cube and the bowl go to zero?(a)Solve in Newton Law.(b)Kinetic-Energy Theorem.(c)Conservation Theorem

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A small space probe Is released from a spaceship. The space probe has mass 20.0 kg and contains 90.0 kg of fuel. It starts from rest in deep space, from the origin of a coordinate system based on the spaceship, and bums fuel at the rate of 3.00 kg/s. The engine provides a constant thrust of 120.0 N. (a) Write an expression for the mass of the space probe as a function of time, between 0 and 30 seconds, assuming that the engine ignites fuel beginning a t=0 . (b) What is the velocity after 15.0 s? (c) What is the position of the space probe after 15.0 s, with initial position at the origin? (d) Write an expression for the position as a function of time, for t30.0s .

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