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aliina [53]
3 years ago
6

Find the force of gravity between two physics students that have masses of 74.0 kg and 82.5 if they are sitting 0.95 m apart

Physics
1 answer:
MrRissso [65]3 years ago
7 0
<span>The force of gravity is calculated by F = G*(m1*m2)/r^2. Here m1 = 74 kg, m2 = 82.5 kg and r = 0.95 m (and G is 6.674Ă—10â’11 m3â‹…kgâ’1â‹…sâ’2). Plug in and calculate: F = 6.674e-11 * (74*82.5)/(0.95^2) ~ 4.52 e-7 N = 45 µN Answer: the force is 45 µNewtons.</span>
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complete question:

An observer at the top of a 462-ft cliff measures the angle of depression from the top of the cliff to a point on the ground to be 5°. What is the distance from the base of the cliff to the point on the ground? Round to the nearest foot

Answer:

a ≈  5281 ft

Explanation:

The observer at the top of a 462 ft cliff  measures the angle of depression from the top of the cliff to a point on the ground to be 5°.

The angle of depression form the top of the cliff = 5°

The 5° is outside the triangle formed . To find the angle in the triangle we have to subtract 5° from 90°.  90° - 5° = 85° Note sum of an angle on a right angle is 90°.  

using SOHCAHTOA  principle we can solve for the distance from the base of the cliff to the point on the ground(a)

tan  85° = opposite / adjacent

tan 85°  = a / 462

cross multiply

462 × tan 85° = a

a = 11.4300523 × 462

a =  5280.66  ft

a ≈  5281 ft

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