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A car of mass 750kg is traveling east on a level road. Its engine exerts a constant force of 2.0kN causing the car to accelerate at 1.2ms-2 until it reaches a speed of 25ms-1. Calculate the net force and the force of friction acting on the car.
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Asked 12/1/2008 11:56:59 AM
Updated 8/15/2024 11:54:49 AM
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User: A car of mass 750kg is traveling east on a level road. Its engine exerts a constant force of 2.0kN causing the car to accelerate at 1.2ms-2 until it reaches a speed of 25ms-1. Calculate the net force and the force of friction acting on the car.

Weegy: [http://au. /question/index?qid=20070927042754AAOKdGW]

User: The human ear is more sensitive to certain frequencies of sound. How is this taken into account when measuring sound intensity levels?

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Asked 12/1/2008 11:56:59 AM
Updated 8/15/2024 11:54:49 AM
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When measuring sound intensity levels, the human ear's varying sensitivity to different frequencies is accounted for by using weighted scales like A-weighting, which adjusts measurements to reflect how humans perceive sound intensity across frequencies.

Added 8/15/2024 11:52:05 AM
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Solution:
F_{{net}} = m × a
F_{{net}} = 750 {kg} × 1.2 {m/s}^2 = 900 {N}
2000 {N} - F_{{friction}} = 900 {N}
F_{{friction}} = 2000 {N} - 900 {N} = 1100 {N}
Added 8/15/2024 11:54:47 AM
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