Answer:
Explanation:
We name M the larger mas, and m the smaller mass, so base on this we write the following conservation of momentum equation for the collision:
We can write this in terms of what we are looking for (the quotient of masses :
We use now the information about Kinetic Energy of the system being reduced in half after the collision:
We can combine this last equation with the previous one to obtain:
where solving for the quotient m/M gives:
Answer:
A. is the answer hope this helps
Answer: D
Explanation:
The net force acting on an object is equal to the resultant of the forces acting on the object itself.
In object A), we see that the vertical forces are balanced (+3 N upward and -3 N downward), as well as the horizontal forces (+5 N right and -5 N left), so the net force is zero.
In object B), the vertical forces are balanced (+3 N upward and -3 N downward). The horizontal force (5 N left) is not balanced, so it produces a net force, however this net force is towards left.
In object C), there are only two vertical forces which are balanced (+20 N upward and -20 N downward), so the net force is zero.
In object D), there are only two vertical forces which are not balanced, and the net force is +40 N (upward) - 25 N (downward) = +15 N upward.
Answer:
C
Explanation:
The density is what determines if it will float. Lower densities float, while higher densities sink. Density takes mass and volume into account.