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jakhunter354
27.07.2021 •
Physics
A toy car with a mass of 5.5 kg is moving horizontally over flat ground at a speed of 2.1 m/s. An unknown force then directly pushes the car for a distance of 3 meters, after which the car has a speed of 7.3 m/s. You may assume that air resistance and friction are both negligible. What was the magnitude of the unknown force
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Ответ:
The magnitude of the unknown force is 44.8 N.
Explanation:
The force can be found with Newton's second law:
Where:
m: is the mass of the toy car = 5.5 kg
a: is the acceleration
F: is the force =?
We can calculate the acceleration with the following kinematic equation:
Where:
d: is the distance traveled = 3 m
Hence, the acceleration is:
Finally, the magnitude of the force is:
Therefore, the magnitude of the unknown force is 44.8 N.
I hope it helps you!
Ответ:
The answers that apply;
They increase precipitation on the windward sides of mountain rangesThey force cool, moist air from oceans to rise as they move toward landThe air above the oceans in coastal areas become humid as the sun heats up the oceans in the day. The oceans, however, remain cooler than the land because the water has a high heat capacity. Therefore, as air on land rises (due to lower density), it is replaced by the cooler air mass from the oceans (this is called a sea breeze). When the cool humid air encounters mountains inland, it is forced to rise and it gets even cooler. The moisture in the air condenses and precipitates in the windward side of the mountain.