suppose you are walking home after school. The distance from school to your home is five kilometers. on foot you can get home in
2 answers:
<u>Answer:</u> The average speed while walking is 12 km/hr.
<u>Explanation:</u>
Average speed is defined as the ratio of total distance traveled to the total time taken.
To calculate the average speed while walking, we use the equation:
We are given:
Distance from school to home = 5 km
Time taken = 25 mins = 0.417 hr (Conversion factor: 1 min = 60 sec)
Putting values in above equation, we get:
Hence, the average speed while walking is 12 km/hr.
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Answer:
1/9
Explanation:
<em>Newton’s Law of Universal Gravitation </em>
Objects with mass feel an attractive force that is proportional to their masses and inversely proportional to the square of the distance.
F = GMm/r²
where
F - the gravitatioal force in Newtons,
M and m -two masses in kilograms
r - the separation in meters.
G - the gravitational constant (6.674*10 ⁻¹¹ N (m/kg) ² )
Because of the magnitude of G , gravitational force is very small unless large masses are involved.
So according to above equation , when the masses are not changing , force is inversely propotional to the square of distance
F1 ∝ 1/r² ---------------(1)
F2 ∝ 1(3r)²
F2 ∝ 1/9r²--------------(2)
(2)/(1)
From their you get as the distance tripled, Force reduce by a factor of 9(3³)
for example , assume the distance get doubled ,Force reduce by a factor of 4 (2²)