Achild standing on a bus remains still when the bus is at rest. when the bus moves forward and then slows down, the child continues moving forward at the original speed. this is an example of
a. newton's second law of motion.
b. an action-reaction pair.
c. newton's third law of motion.
d. newton's first law of motion.

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s