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Pursued by ferocious wolves, you are in a sleigh with no horses, gliding without friction across an ice-covered lake. You take an action described by the equations
(a) Complete the statement of the problem, giving the data and identifying the unknowns. (b) Find the values of v1f and v2f (c) Find the amount of energy that has been transformed from potential energy stored in your body to kinetic energy of the system.
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Chapter 9 Solutions
Physics for Scientists and Engineers
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- A clever coyote uses rocket powered skates to try to catch a roadrunner. The mass of the coyote is 38.1 kg. If the coyote starts from rest, and accelerates to a final speed of 26 m/s in a distance of 2.4 m, how much thrust force did the rockets excert to get him to his final speed? Assume this thrust is constant over the 2.4 m.arrow_forwardA bowling ball weighing 61.5 N initially moves at a speed of 4.00 m/s. How long must a force of 42.5 N be applied to the ball to stop it?arrow_forwardA 20-kg particle moves with this trajectory: r ( t ) = − 40 t ȷ ^ + 25 t ı ^ + ( 5 ı ^ − 8 ȷ ^ ) e − 5 t Calculate the force on the particle. (Units are meters, seconds, and Newtons.)arrow_forward
- A boat and its passengers have a combined mass of 5.10x10^2 kg. The boat is coasting into a pier at a speed of 1.00 m/s. How great a force is required to bring the boat to rest in 1.00x10^2 s?arrow_forwardTwo forces É, = (81.24i – 26.83j) N and É, = (27.41i - 80.52j) N are exerted on a particle. The particle's mass is 23.21 kg. (a) Find the particle's acceleration in component form. (Express your answer in vector form.) a = m/s? (b) What are the magnitude and direction of the acceleration? magnitude |m/s2 direction counterclockwise from the +x axisarrow_forwardరికంగ్ డ్ A hockey puck with mass 0.150 kg is sitting at rest on frictionless ice when it is struck with a hockey stick. The puck then slides forward with a speed of 30.3 m/s. The hockey stick was in contact with the ball for 9.50 x 10 seconds. What was the size of the average force exerted on the hockey puck by the hockey stick? (A) 478 N (B 0.521 213 N D 1.47 Narrow_forward
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