Write down the equation which describes the simple harmonic motion of a 0.4 kg mass on a spring with a spring constant k = 100 n/m, that starts its motion (at t = 0 s) at its maximum positive displacement of +0.5 m.

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to. in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

What are the north and south poles of a solenoid change with?