A 4.38 kg sphere makes a perfectly inelastic collision with a second sphere that is initially at rest. The composite system moves with a speed equal to one third the original speed of the 4.38 kg sphere. What is the mass of the second sphere?

The mass of the second sphere is 8.76 kg

Explanation:

The equation for a perfectly inelastic collision follows:

where,

are the mass and initial velocity of first sphere

are the mass and initial velocity of second sphere

v = final velocity of the system

We are given:

Rearranging the above equation, we get:

Plugging values in the above equation, we get:

Hence, the mass of the second sphere is 8.76 kg

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.