Answer:
15km/hr
Explanation:
The average speed for the entire trip is the sum of the total distance traveled divided by the total time of the trip.
Total time = 4hr
distance for the first 3hrs = 50km
distance for the last 1hr = 10km
Total distance = 50km + 10km = 60km
Now;
Average speed =
Insert the parameters and solve;
Average speed = = 15km/hr
Gear because each spike is a wedge shape that adds a mechanical advatage
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Explanation:
Answer:
The gravitational force does change believe it or not, but the explanation for this is that the Earth's orbit is an oval (or circle) the closer it nears itself to the Sun. The Sun's gravitational pull pulls the Earth to it, bringing it closer and as it reaches the other side, let's call this L; When it reaches L, it becomes the same gravitational pull reset as A is, and another section over the Sun, lets call this M; and when it reaches M, its the same pull as B.