T print-out should have 9 questions. If an out of control 15000 kg truck enters
ID: 1774190 • Letter: T
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T print-out should have 9 questions. If an out of control 15000 kg truck enters Multiple-choice questions may continue on the lane going at 30 m/s, how far along the the next column or page find all choices ramp does it go? The acceleration due to before answering gravity is 10 m/s. 001 (part 1 of 2) 10.0 points 1.90 m A bead slides without friction around a loop the-loop. The bead is released from a height2. 75 m 18.2 m from the bottom of the loop-the-loop which has a radius 6 m. 3-45m 4. 60m 5. 105 m The acceleration of gravity is 9.8 m/s 6 006 10.0 points In an arcade game a 0.141 kg disk is shot across a frictionless horizontal surface by com- pressing it against a spring and releasing it. 18.2 m If the spring has a spring constant of 248 N/m and is compressed from its equi- librium position by 8 cm, find the speed with which the disk slides across the surface. What is its speed at point A? Answer in units of m/s. Answer in units of m/s 002 (part 2 of 2) 10.0 points How large is the normal force on it at point A if its mass is 4 g? 007 (part 1 of 3) 10.0 points A block is pushed against the spring with spring constant 11 kN/m (located on the left- hand side of the track) and compresses the spring a distance 5.3 em from its equilibrium Answer in units of N 003 10.0 points A 69.2 kg high jumper leaves the ground withposition (as shown in the figure below). a vertical velocity of 12 m/s The block starts at rest, is accelerated by the compressed spring, and slides across a frictionless track except for a small rough area on a horizontal section of the track (as shown How high can he jump? The acceleration of gravity is 9.8 m/s Answer in units of m. in the figure below). 004 10.0 points It leaves the track horizontally, flies through A potential energy function for a two dimensional force is of the form the air, and subsequently strikes the ground. The acceleration of gravity is 9.8 m/s 13.27 J/m" and b =-1 J/m. 11 kN/m 581 g where a Find the magnitude of the force that acts at the point (x, y) for 20 m, y-, 87 m. 5.3 Answer in units of N -0.4 005 10.0 points A runaway truck lane heads uphill at 30 to the horizontal What is the speed u of the block when itExplanation / Answer
001) R = 6 m , h = 18.2 m
Ki + Ui = Kf + Uf
m g h = m v2 / r + m g (2 R)
v = sqrt [2 g (h - 2 R)] = sqrt [2 * 9.8 (18.2 - (2 * 6))]
v = 11.0 m/s
002) N = m [v2 / R - g]
= 4 * 10-3 [112/6 - 9.8]
N = 0.0415 N
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