An object with mass 2.3 kgkg is executing simple harmonic motion, attached to a spring with spring constant 260 N/mN/m . When the object is 0.021 mm from its equilibrium position, it is moving with a speed of 0.60 m/sm/s .
(a) Calculate the amplitude of the motion.
m
(b) Calculate the maximum velocity attained by the object. [Hint: Use conservation of energy.]
m/s

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?

Can anybody me with this? ? (picture included.)