Aspring with a spring constant of 1200 n/m has a 55-g ball at its end. the energy of the system is 5.5j. what is the amplitude of vibration?

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.

Due in 40 explain in terms of frame of reference if you’re inside a moving train everything on the outside can seem to be moving