Amass weighing 16 pounds stretches a spring 6 inches and another spring 2 inches. the two springs are then attached in parallel to a common rigid support. find the equation of motion if the mass is initially released from the equilibrium position with a downward velocity of 2 ft/s.

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

What effects result when there is an impact between earth and an asteroid? check all that apply. a.massive flooding. b.extinction of many life forms.c.major earthquakes change in average global temperature.d. giant dust cloud

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87