What is force of attraction between two students of mass 20kg,10meters apart?

Use Newton's universal law of gravity. It has a constant G in it that you will need to look up. You should find the exercise useful.

It looks like this:

F = G M1*M2/R^2

6.67

To calculate the force of attraction between two objects, you can use Newton's Law of Universal Gravitation. The formula for calculating the force of attraction (F) between two objects is:

F = (G * m1 * m2) / r^2

Where:
F is the force of attraction,
G is the gravitational constant (approximately 6.67430 × 10^-11 N m^2/kg^2),
m1 and m2 are the masses of the two objects, and
r is the distance between the centers of the two objects.

In this case, the mass of each student is 20 kg, and the distance between them is 10 meters. Plugging these values into the formula, we can calculate the force of attraction between the two students:

F = ((6.67430 × 10^-11 N m^2/kg^2) * (20 kg) * (20 kg)) / (10 m)^2

Simplifying:

F = (6.67430 × 10^-11 N m^2/kg^2) * 400 kg^2 / 100 m^2

F = 2.66972 × 10^-8 N

Therefore, the force of attraction between the two students is approximately 2.66972 × 10^-8 Newtons.