Mcat Audio Osmosis

Question 1

Difference between inertia and momentum

Answer 1

Inertia is objects tendency to stay in its present state of motion and momentum is objects tendency to keep moving.

Momentum is dependent on the reference frame and inertia is not

Question 2

Frictional force times the distance

Answer 2

Change in mechanical energy of the system only not the change in internal energy so it doesn’t represent the total change in energy

Question 3

The only force that changes the internal energy

Answer 3

Friction

So in absence of friction change in internal energy is zero

So in case of zero friction, heat, change in energy is just change in kinetic energy plus change in potential energy

Question 4

What energy is always associated with conservative forces

What are conservative forces always dependent upon?

Answer 4

Potential energy

Gravitational potential energy
Elastic potential energy

Conservative forces are distance dependent