Which is an inertial reference frame (or at least a very good approximation of one)? Which is an inertial reference frame (or at least a very good approximation of one)? A jet plane flying straight and level at constant speed. A jet plane turning takeoff, a jet plane flying straight and level at constant speed, AND a jet plane turning at constant speed. A jet plane during takeoff. A jet plane flying straight and level at constant speed AND a jet plane turning at constant speed. A jet plane turning at constant speed.

A jet plane flying straight and at level at constant speed

Explanation:

     The inertial frame of reference is a frame of reference in which all Newton law  is valid ie Newton second law of motion and therefore newton first law of motion holds good. The frame of reference does not accelerate.

All the object that is in the frame of reference are at rest or moving with constant rectilinear motion with constant velocity unless acted upon by any force.

conservation of mass

mass before something happens = mass afterwards

the force represented by vector a is normal force. if the hockey puck is moving to the right, when it is hit with a significant force by the hockey stick the puck will move off in a different direction. correct on edge.