Two point masses m and 3m are placed at a distance l apart. another point mass m is placed in between on the line joining them so that the net gravitational force acting on it due to masses m and 3m is zero. the magnitude of gravitational force acting due to mass m on mass m will be

Gravitational force acting on mass m due to mass M can be calculated by formula:

F = GMm/r²

where,

F is the gravitational force

G is the gravitational constant which is equal to 6.67x10∧-11

M and m are the masses of given objects

r is the distance between point masses M and m.

From the given condition, when the mass m is placed such that net gravitational force acting on it due to masses M and 3M is zero, we have:

r= L/3

therefore,

F= 9GMm/L²

The magnitude of force acting due to mass M on mass m will be 9GMm/L².

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

higher potential

explanation:

because it is in a high speed so it must move into a of high potential