When a weight W is hanging from a light vertical string, the speed of pulses on the string is V. If a second weight W is added without stretching the string, what is the new speed of pulses on this string in terms of V?

If y gets smaller as x gets bigger and y have an relationship?

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m