Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
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Chapter 5, Problem 25P
To determine
To describe:The extra force the sprinter must exert on the ground is to be calculated.
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Chapter 5 Solutions
Physics Fundamentals
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- A car is driving along a level and unbanked circular track of diameter d=0.54km at a constant speed of v=21.2m/s. Write an expression for the magnitude of the acceleration of the car in terms of the given parameters.What is the magnitude, in meters per squared second, of the acceleration of the car?Write an expression for the minimum coefficient of friction between the car's tires and the road that is required in order to keep the car going in a circle in terms of the given parameters.What is the value of the minimum coefficient of friction between the car's tires and the road that is required in order to keep the car going in a circle?arrow_forwardA sprinter of mass 69.3 kg runs at a constant speed of 10.2 m/s in a straight line. Find the extra force the sprinter must exert on the ground to round a curve of radius 10.7 marrow_forwardA curve in a road forms part of a horizontal circle. As a car goes around it at constant speed 14.0 m/s, the total horizontal force on the driver has magnitude 130 N. What is the total horizontal force on the driver if the speed on the same curve is 18.0 m/s instead?arrow_forward
- A race car travels 76 m/s around a circular track of radius 159 m What is the magnitude of the resultant force on the 1600 kg driver and his car if the car does not slip? Answer in units of kN.arrow_forwardThe coefficient of friction acting upon a 945-kg car is 0.850. The car is making a 180-degree turn around a curve with a radius of 35.0 m. Determine the maximum speed with which the car can make the turn.arrow_forwardProblem (1): An 5-kg object moves around a circular track with a radius of 18 cm with a constant speed of 6 m/s. Find (a) The magnitude and direction of the acceleration of the object. (b) The net force acting upon the object causing this acceleration.arrow_forward
- A 2 kg box is against a vertical wall by a small force (f1=10n) perpendicular to the surface of the wall, and pushed upward by a force. Force applied to the box vertically. The force pushes the box and the wall. Determine the value of the applied force to keep the box moving upward at a constant velocityarrow_forwardA car is moving along a horizontal curve of radius 20 m, and coefficient of friction between the road and wheels of the car is 0.25. If acceleration due to gravity is 9.8 m/s², then its maximum speed is.arrow_forwardA small 175-g ball on the end of a light string is revolving uniformly on a frictionless surface in a horizontal circle of diameter 1.0 m. The ball makes 2.0 revolutions every 1.0 s. (a) What are the magnitude and direction of the acceleration of the ball? (b) Find the tension in the string.arrow_forward
- (a) Find the magnitude of the gravity force between a planet with mass 5.50 x 1024 kg and its moon, with mass 8.35 x 1022 kg, if the average distance between them is 4.65 x 108 m. N (b) What is the acceleration of the moon toward the planet? (Give the magnitude.) |m/s² (c) What is the acceleration of the planet toward the moon? (Give the magnitude.) m/s²arrow_forwardIn a laboratory experiment, an initially stationary electron (mass = 9.11 x 10–31 kg) undergoes a constant acceleration through 2.4 cm, reaching a speed of 5.7 x 106 m/s at the end of that distance. What are (a) the magnitude of the force accelerating the electron and (b) the electron's weight?arrow_forwardJack is in his car with a mass 1800 kg and going over the top of a hill which has a radius of 100m. The car is moving at 72 km/h and accelerating forward at 2.0 m/s^2. What is the magnitude of the total force of the road on his car?arrow_forward
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