College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- A bowling ball of mass m = 1.2 kg is launched from a spring compressed by a distance d = 0.31 m at an angle of θ = 36° measured from the horizontal. It is observed that the ball reaches a maximum height of h = 4.6 m, measured from the initial position of the ball. Let the gravitational potential energy be zero at the initial height of the bowling ball. what is the spring constant k, in newtons per meters? k = ?arrow_forwardThe force required to compress a non-standard spring as a function of displacement is given by the equationF(x) = -Asin(bx) + kx,where A = 11 N, b = 11 rad/m, and k = 78 N/m. Part (b) Calculate the work done in joules as the spring is compressed from x = 0 to x1 = 32 cm. Part (c) Calculate the work done in joules as the spring is compressed from x1 = 32 cm to x2 = 69 cmarrow_forwardAn object with a 2.00 kg mass moving along the positive x axis in the +x direction has a speed of v = 2.50 m/s at the position x = 0.500 m and a potential energy of U(x) = (−4.00 J · m)/x. Determine the following. (a) an expression for the x component of the force acting on the object at any position along the x axis (Use the following as necessary: x. Do not enter units in your expression.) Fx = (b) work done on the object by this force acting on the object from x = 1.00 m to x = 1.94 m J(c) change in potential energy of the object as it travels from x = 1.00 m to x = 1.94 m J(d) total energy of the object at any point along the x axis J(e) maximum distance the object can travel from the origin in the +x direction marrow_forward
- A hurricane wind blows across a 8m x 17m flat roof at a speed of 135 km/h. Calculate the force exerted on the roof. Hint: The thickness of the roof is small, so the change in potential energy between the inside of the house and the outside can be approximated to be zero. ρair =1. 28 kg/ m3 .arrow_forwardProtons and neutrons (together called nucleons) are held together in the nucleus of an atom by a force called the strong force. At very small separations, the strong force between two nucleons is larger than the repulsive electrical force between two protons--hence its name. But the strong force quickly weakens as the distance between the protons increases. A well-established model for the potential energy of two nucleons interacting via the strong force is U=U0[1−e−x/x0] where x is the distance between the centers of the two nucleons, x0 is a constant having the value x0 = 2.0 × 10−15 m, and U0 = 6.0 × 10−11 J. Quantum effects are essential for a proper understanding of nucleons, but let us innocently consider two neutrons as if they were small, hard, electrically neutral spheres of mass 1.67 ×10−27 kg and diameter 1.0 × 10−15 m. Suppose you hold two neutrons 9.0 × 10−15 m apart, measured between their centers, then release them.What is the speed of each neutron as they crash…arrow_forwardNeeds Complete typed solution with 100 % accuracy.arrow_forward
- Problem 4: A 2.00 kg object moving in the x-y plane is under the influence of a force describe by the potential energy U (x,y) = (4.00 J/m³)x3 – (2.00 J/m4)y“. What is the magnitude and direction (angle) of the acceleration of the object at a point x=1 m and y = 2 m?arrow_forwardIf the potential energy of a particle is given by U (r, y, 2) = –kry?2³, find the force associated with this potential energy where k is a positive constant. k(2x²yz³i+y²z³j + xy²2²k) kry²2*(i + ĵ + k) k(y²2³i + 2xyz³j + 3xy²2²k) -kry 2*(i +j+ k) 33 3 k(y²2*i+ xyz°j +xy²2² k)arrow_forwardAn object moves in the x-y plane while acted on by the force F(x,y) = k1yi + k2xj, where k1 and k2 are constants with units of N/m. The object moves along a straight line path from Cartesian coordinate (x1, y1) to (x2, y2). Write an expression for the work done on the object by this force.arrow_forward
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