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3 years ago

Please help me with #15, it’s converting units

Physics

1 answer:

Pavlova-9 [17]3 years ago

6 0

40 km/h to in/s
60*60=3600 seconds in an hour
one km is about 0.621 miles
40 km is about 0.621*40=24.84 miles
5280 feet in a mile
12 inches on each foot
5280*12=63360 inches in a mile
63360*24.84=1573862.4 inches in 40km
40 km/h = 40*1573862.4/3600=17487.36 in/s

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The box is kept in motion at constant velocity by a force of F=99 N. Constant velocity means there is no acceleration, so the resultant of the forces acting on the box is zero. Apart from the force F pushing the box, there is only another force acting on it in the horizontal direction: the frictional force $F_f$ which acts in the opposite direction of the motion, so in the opposite direction of F.
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The frictional force can be rewritten as
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<h3 /><h3>What is biogas?</h3>

Biogas is a combination of gases made from agricultural waste, manure, municipal trash, plant material, sewage, green waste, and food waste.

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To learn more about biogas, refer to the link;

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