20° N W1 W 20° Problem 11 A skier is on a 20° downward slope. The conditions are such that there's no friction or wind resistance to slow them down. If their mass is 70 kg and the acceleration due to gravity is.9.8 m/s² straight down, what's the magnitude of their acceleration? Don't forget units! 1 C

20° N W1 W 20° Problem 11 A skier is on a 20° downward slope. The conditions are such that there's no friction or wind resistance to slow them down. If their mass is 70 kg and the acceleration due to gravity is.9.8 m/s² straight down, what's the magnitude of their acceleration? Don't forget units! 1 C

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter2: Motion In One Dimension

Section: Chapter Questions

Problem 2.49P: It is possible to shoot an arrow at a speed as high as 100 m/s. (a) If friction can be ignored, how...

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An object with a mass of 1.76 kg is initially at rest upon a horizontal, frictionless surface. An applied force of 3.04 N i acts on the object for 2.08 s. What is the object's final speed? Enter a number rounded to 2 decimal places and assume the answer has proper SI Units.
9. Consider the falling object of mass 10 kg in Example 2, but assume now that the drag force is proportional to the square of the velocity. a. If the limiting velocity is 49 m/s (the same as in Example 2), show that the equation of motion can be written as 1 (49² - 1²). 245 dy dt Also see Problem 21 of Section 1.1. b. If y(0) = 0, find an expression for v(t) at any time. Gc. Plot your solution from part b and the solution (26) from Example 2 on the same axes. d. Based on your plots in part c, compare the effect of a quadratic drag force with that of a linear drag force. e. Find the distance x(t) that the object falls in time t. Nf. Find the time T it takes the object to fall 300 m.
In 1898, the world land speed record was set by Gaston Chasseloup-Laubat driving a car named Jeantaud. His speed was 39.24 mph (62.78 km/h), much lower than the limit on our interstate highways today. Repeat the calculations of Example 2.7 (acceleration for first 6 miles, time of timed mile, acceleration for last 6 miles) for the Jeantaud car. Compare the results of the ThrustSSC to Jeantaud.
It is possible to shoot an arrow at a speed as high as 100 m/s. (a) If friction can be ignored, how high would an arrow launched at this speed rise if shot straight up? (b) How long would the arrow be in the air?
When starting a foot race, a 70.0-kg sprinter exerts an average force of 650 N backward on the ground for 0.800 s. (a) What is his final speed? (b) How far does he travel?
(a) What is the final velocity of a car originally traveling at 50.0 km/h that decelerates at a rate of 0.400m/s2for 50.0 s? Assume a coefficient of friction of 1.0. (b) What is unreasonable about the result? (c) Which premise is unreasonable, or which premises are inconsistent?
1. A force F=100 N is acting on an object of mass m=10 kg. The force makes an angle of 10° with the x-axis. Calculate the acceleration of the 9.85 m/s 8.69 m/s object. A в 7.52 m/s D 6.34 m/s 2. A 1000 kg object is rising. Its speed is increasing at 3 m/s. The force on the object is: A 1000 N B 3000 N 9800 N D 12800 N 3. A 16 kg object is initially at rest. A constant force of 8.0 N is exerted for 4 s on that object. The change in speed of this object will be 2.0 m/s 6.0 m/s 0.5 m/s 4.0 m/s A B D
Lift on an airplane is F = (P2-P1) A. The total wing area of a certain airplane is 20 square meter. Air, of density 1.2 kg/m3 , is streaming past the upper wing at 50 m/s and the lower wing at 10 m/s. What is the lift on this airplane? %3D of O a 800 N O b. 9,600N Oc 480 N Od. 16,000 N
6. A 15kg-particle moves in æyz – plane experience a force of F = 12 N i – 20 N j + 10 N k. Determine the acceleration vector of the particle.
A and B machine parts which are have m-5 kg mass each are connected. The rod dimensions are 253 mm for OA and 250 mm for rod AB. If A is released from rest at this position, please calculate its velocity VA when it crosses red point in the centerline. Friction is neglected. 60° A
The surface of a pool table is h=0.710 m from the floor. The winner of a competition wants to know if he has broken the world speed record for the break shot of 32 mph (about 14.3 m/s). A. If the winner’s ball landed d=4.95 m from the table’s edge, calculate the speed of his break shot v0. Assume friction is negligible. B. At what speed v1 did his pool ball hit the ground? Image is attached below. Please show all work.
A 150-g baseball is dropped from a tree 15.0 m above the ground. a.)With what speed would it hit the ground if air resistance could be ignored? Express your answer to three significant figures and include the appropriate units. b.)If it actually hits the ground with a speed of 8.00 m/s, what is the magnitude of the average force of air resistance exerted on it? Express your answer to three significant figures and include the appropriate units.