Procopio is diving a car (m= 1000 kg) at v= 11.11 mis when he stepped on the brakes. The car traveled a istance of s= 15 m before stopping completely. How much force F was needed to stop the car? he formula for the work done by the force F as the car traveled a distance s before stopping is: y the viork-energy theorem: - K - % Combining these two equations for work and isolating F. we obtain an expression for F: F- 4114.403 Km's Plugging in values, we know that 4.4 nevwtons of force is needed to stop the car.

Physics for Scientists and Engineers, Technology Update (No access codes included)
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Author:Raymond A. Serway, John W. Jewett
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Chapter7: Energy Of A System
Section: Chapter Questions
Problem 7.3OQ: A worker pushes a wheelbarrow with a horizontal force of 50 N on level ground over a distance of 5.0...
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Procopio is driving a car (m = 1000 kg) at vy = 11.11 m/s when he stepped on the brakes. The car traveled a
distance of s = 15 m before stopping completely. How much force F was needed to stop the car?
The formula for the work done by the force Fas the car traveled a distance s before stopping is:
By the work-energy theorem:
2
W=
- K =-
Combining these two equations for work and isolating F., we obtain an expression for F:
F= 4114.403
xm/s
Plugging in values, we know that
4.4 newtons of force is needed to stop the car.
Transcribed Image Text:Procopio is driving a car (m = 1000 kg) at vy = 11.11 m/s when he stepped on the brakes. The car traveled a distance of s = 15 m before stopping completely. How much force F was needed to stop the car? The formula for the work done by the force Fas the car traveled a distance s before stopping is: By the work-energy theorem: 2 W= - K =- Combining these two equations for work and isolating F., we obtain an expression for F: F= 4114.403 xm/s Plugging in values, we know that 4.4 newtons of force is needed to stop the car.
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