Answered: A '69 Thunderbird is cruising around a…

A '69 Thunderbird is cruising around a circular track. Since it's turning a centripetal force is required. What type of force supplies this centripetal force? How much work does this force do?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A recently patented pile driver pounds piles into the ground by launching 15 kg bowling balls from a spring loaded gun, up around a frictionless loop-de-loop of radius r= 8 m, and down onto the pile. When the spring is compressed by As = 2 m, the bowling balls have a speed of 20 m/s at the top of the loop, as shown. (You may v = 20 m/s r=8 m assume g = 10 m/s².) k ? As = 2 m Find the spring constant of the gun. pile A) Zero B) 100 N/m C) 2700 N/m D) 150 N/m E) 1300 N/m O A O B O D O E
A skier weighing 0.85 kN goes over a frictionless circular hill as shown. If the skier's speed at point A is 8.8 m/s, what is his speed at the top of the hill (point B)?
spring has a force constant of 332N/m and an unstretched length of 5 em. One end is attached to a post that is free to rotate in the center of a smooth table, as shown in the top view below. The other end is attached to a 3 kg disk moving in uniform circular motion on the table, which stretches the spring by 4 cm. Note: Friction is negligible. 332 N/m 3 kg 9 cm here f the What is the centripetal force F on the disk? Answer in units of N.
4. a) When a car drives at constant speed in a circle on a flat road, the work done by the static friction between the tires and the road is zero. Explain why. (it has something to do with directions) c) When using the formula K, + U, + Wnc = K, + U2, we do not include the work done by gravity or a spring in the term Wnc. Why not? Doesn't that leave out the effect of those forces? I am looking for two parts to the answer. d) In a collision between two objects where the objects only interact with each other, is momentum sometimes or always conserved, and is kinetic energy sometimes or always conserved? If it is sometimes, be clear on when it is conserved.
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C7 19.) You reach out the second story window, which is 5 m above the sidewalk, and throw a 0.5 kg ball straight upward with 2 J of kinetic energy. (a) What is the ball's gravitational potential energy when it is released?__________________________ J(b) What is the ball's gravitational potential energy just before hitting the sidewalk?___________________________ J(c) What is the ball's kinetic energy just before hitting the sidewalk?___________________________ J (d) How would the answer to part c change if the ball had initially been thrown straight down with 2 J of kinetic energy? A.) stay the same B.) decrease C.) increase
As shown in the figure below, a small box is released from rest at point A along the horizontal diameter on the inside of a frictionless, hemispherical bowl. The box has a mass m = 295 g and the bowl has a radius R = 33.0 cm. 2R/3 (a) Calculate the gravitational potential energy of the box-Earth system (in J) when the box is at point A relative to point B. J (b) Calculate the kinetic energy of the box (in J) at point B. (c) Calculate its speed (in m/s) at point B. m/s (d) Calculate its kinetic energy (in J) when the box is at point C. (e) Calculate the potential energy (in J) when the box is at point C.
Q4. A ball of mass m attached to one end of a thin, light, inextensible string moves with speed vo in a circle of radius ro in free space. Calculate the work required to reduce the radius from rotor by pulling the other end of the string through a smooth tube that is perpendicular to the plane of the circle. Express the result in terms of m, vo, ro and r. (HINTS: 1) Tension in the string is a central force and therefore the angular momentum is conserved 2) If radius changes then the speed changes, hence the KE. (Use work-energy theorem) See the representative figure given below: ७o
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A 70 kg secret agent skis down a hill and grabs a 200 kg bag then flies off a 12 m high cliff. The hill can be considered a 1/4 of a circle with a radius of 20 m. a) The initial mechanical energy of the agent at the top of the hill is 14,560 J relative to the location of the bag. If the average force of friction is 120 N determine the velocity of the agent before he picks up the bag. B) what is his apparent weight right before he picks up the bag? C) how fast is the agent traveling after he grabs a bag? D) how far from the base of the cliff does the agent land? Assume the resistance is negligible. E) Assume that the agent in his bag come to rest upon colliding with the ground at the base of the cliff. What is an impulse that he in the bag experiences? Estimate the resulting contact force on the agent. Discuss the likelihood of his living through the collision.
A fielder tosses a 0.15 kg baseball at 36 m/s at a 27 degree angle to the horizontal. What is the ball's kinetic energy at the start of its motion? What is the kinetic energy at the highest point of its arc?
A rock is attached to an end of a 0.80 m rope. You whirl the 2.0 kg rock in a circle while holding m the other end of the rope. If it moves at a constant speed of 6.0 -, what is the work done on S the rock for every revolution it makes? O 90 J zero 72 J O 16 J