An object attached to a spring is pulled across a horizontal frictionless surface. If the force constant (spring constant) of the spring is 28 N/m and the spring is stretched by 2 m when the object is accelerating at 8 m/s/s, what is the mass of the object?

A 25.0 cm long spring is hung vertically from a ceiling and stretches to 32.5 cm when a 7.00 kg mass is hung from its free end. HINT (a) Find the spring constant (in N/m). N/m (b) Find the length of the spring (in cm) if the 7.00 kg weight is replaced with a 175 N weight. cm

A frictionless spring with a 8-kg mass can be held stretched 1.2 meters beyond its natural length by a force of 100 newtons. Find the position of the mass after t seconds if the mass experiences a retarding force equal to twice its velocity and it starts at a velocity of 2 m/s: meters

Spring scales are often used in markets for weighing produce and simply consist of a spring connection to a gauge that displays how far the spring has stretched and correlates that to the weight of the produce. (a) What is the spring constant (k) for the spring in the scale if the spring stretches .96 cm for .5 kg of potatoes? Number N/m (b) What is the mass of a collection of potatoes if the spring stretches 2.8 cm? Number kg (c) How many cm apart are the quarter-kilogram marks on the scale? (Note: depending on your random values, this may be a much larger distance then you would expect) Number cm