a 12 lb bowling ball goes faster than a 15lb ball when thrown with the same force. Why is this Newton's 2nd law of motion? Please I need an explanation.

For which pair of objects would adding the same a

(**i would really appreciate if this was answered soon** ) which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?