To imitigate back pain, ergonomic seats have been developed. Below is an example of the ergonomic seat and how they distribute force over larger area of back. The distribution of force w on the spine has been plotted. Determine the equivalent resultant force and its location, measured from point O.​

Shelly experiences a backward jolt when the driver starts the school bus. which of the following explains this phenomenon? a. the inertia of shelly b. the inertia of the bus c. the normal force of the seats on shelly d. the net force acting on shelly in a backward direction e. a zero net force acting on shelly

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds