Question

Fill in the blanks.

One assumes there is no net external force when using conservation of __________.

One assumes there are no non-conservative forces when using conservation of ________.

When using the kinematic equations we assume ________ is constant.

I believe the answers are

1) momentum

2) energy

3) acceleration

Answer 1

1.Conservation of momentum applies only when the net external force is zero.

2.Energy conservation is applied Only conservative forces like gravity and the spring force that have potential energy associated with them. Nonconservative forces like friction and drag do not.

3.kinematic equations can be utilized for any motion that can be described as being either a constant velocity motion (an acceleration of 0 m/s^2) or a constant acceleration motion. They can never be used over any time period during which the acceleration is changing. Each of the kinematic equations include four variables.(v,u,s,t)

Hence you choosed right answers