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pishuonlain [190]
3 years ago
10

If you push on a heavy box that is at rest, you must exert some force to start its motion. 5. however, once the box is in motion

you need a smaller force to maintain that motion. why?
Physics
1 answer:
Free_Kalibri [48]3 years ago
5 0
The potential energy has turned into kinetic energy and energy is not lost on the box, some is lost to friction, but most of it is still kept.
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008 (part 3 of 4) 3.0 points
motikmotik

Car A take a time of 2.55hr and car B take a time of 2.14 hr

We know that distance divide by time is speed

here it is given that car A to reach a gas station a distance 189 km from the school traveling at a speed of 74 km/hr​

so speed=distance/time

s=d/t

t=d/s

=189/74

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In case of car B it is given that The distance from the is 199.8km, car b is traveling at a speed of 93 km/hr  

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=199.8/93

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so from the above given data and the formula we solved and found out the time taken by car A is 2.55h and car B is 2.14h

learn more about Speed here brainly.com/question/13943409

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When a relationship between two different things is shown in a fraction it is a ratio.

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