If p1-p2 = above; then what does p2-p1 =? Newton\'s law of gravitation says that

Question

If p1-p2 = above; then what does p2-p1 =?

Newton's law of gravitation says that two masses, m1 andm2,experience an attractive force whose magnitude is given by m 1m2 2 Here G is a universal constant (called the Gravitation constant) and r denotes the distance between the two masses. Of course, force is really a vector-the above formula only specifies its length The assertion that the force is attractive determines its direction. Indeed, the magnitude given above must be multiplied times a unit vector pointing in the correct direction. Let p (T1, y1 be the position vector for body 1 and let p2 (r2, y2) denote the position vector for body 2 (these position vectors are relative to some arbitrary coordinate system. Then, the distance r between the two bodies is given by y2)2 Consider the force, F1, on body 1 caused by the gravitational attraction of body 2. A unit vector pointing toward body 2 is given by p2

Explanation / Answer

p1 - p2 and p2-p1 both have same magnitude . there direction is opposite to each other so if

p1-p2 = above

p2-p1 = -(above)

for example if

p1 - p2 = x i+y j +z k

then p2-p1 = -x i -y j - z k

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