Tuesday

October 21, 2014

October 21, 2014

Posted by **Benji** on Monday, November 20, 2006 at 4:46pm.

would F=ma answer this question?

If a force is exerted by object A on object B, then B exerts a force of equal magnitude and in opposite direction on A. So, there is then a net force on A causing A to accelrate. But B accelerates in the opposite direction.

But the center of mass of A and B does not accelerate, because the total force exerted on the combined system A plus B is zero.

Try to solve this problem by making clever use of Newton's third Law:

Given a sphere of uniform density rho and radius R, what is the gravitatonal force that one half of the sphere exerts on the other half?

**Answer this Question**

**Related Questions**

College physics - According to Newton's Third Law, for every action there is an ...

Physics - What is an equilibrant? (Points : 1) an object that has zero net force...

physics - a strong magnet attracts a paper clip to itself with a certain force. ...

Physics - Ok work... work = net force parallel to displacement lets say ...

Physics - Two colliding objects exert equal and opposite forces on each other (...

physics (work posted) - For a body to be in equilibrium under the combined ...

Physics - a child causes a wagon to accelerate by pulling it with a horizontal ...

Physics - A bike is hanging from a hook in a garage. You need to consider the ...

Physics - A bike is hanging from a hook in a garage. You need to consider the ...

Physics - 1.when a train pulls a wagon, is the work zero because wagon pulls on ...