Question

Mechanical energy is conserved in the presence of which of the following types of forces?

PSS 21.1 Conservation of energy in charge interactions 

Learning Goal: 

To practice Problem-Solving Strategy 21.1 Conservation of energy in charge interactions. 

An alpha particle (a), which is the same as a helium-4 nucleus, is momentarily at rest in a region of space occupied by an electric field. The particle then begins to move. Find the speed of the alpha particle after it has moved through a potential difference of-3.45x10^-3V.

The charge and the mass of an alpha particle are q_a=3.20x10^-19 C and m_a-6.68x10^-27 kg respectively.

Identify the system involving the alpha particle. Then examine the forces acting within this sy whether mechanical energy is conserved. Make certain to draw a before-and-after visual ove symbols. 

Part A 

Mechanical energy is conserved in the presence of which of the following types of forces 

Select all that apply. 

frictional 

magnetic 

electrostatic 

gravitational 

Answer 1