The figure shows two springs (k₁ = 10 N/m and k₂ 20 N/m) attached to a block that can slide on a frictionless surface. In the block's equilibrium position, the left spring is compressed by 1 = 2.0 cm .(Figure 1)

A hanging scale works because the length a spring stretches is directly proportional to the weight pulling down on the spring. These scales are commonly used in grocery stores. You are shopping for bananas and see that they are on sale for $0.29 a pound. When you weigh the bananas, the scale reads 2.40 pounds (1.09 kg). If the bananas cause the spring to stretch 2.30 cm, what is the spring constant of the spring found in the scale?

A simple pendulum is made from a 0.666-m-long string and a small ball attached to its free end. After the ball is released pulled to one side through a small angle and then released from rest. After the ball is released, how much time elapses before it attains its greatest speed?

Two springs, with force constants k1=140N/m and k2=275N/m, are connected in series, as shown in the figure. When a mass m=0.50kg is attached to the springs, what is the amount of stretch, x?

A 1 kg pendulum is held 2 meters above the ground and released. How fast is the pendulum traveling when it reaches it's lowest point? Assume the acceleration of gravity is 10 m/s^2.   Equation:         2.22 m/s     6.32 m/s     12 m/s      14.14 m/s

A spring is compressed 0.4 m under a force of 600 N. What is the spring constant for this spring?

An orthodontic spring, connected between the upper and lower jaws, is adjusted to provide no force with the mouth open. When the patient closes her mouth, however, the spring compresses by 6.0 mm. What force is exerted if the spring constant is 160 N/m?

A marble with a mass of 0.085 kg compresses a spring 5.1 cm. If the spring has a constant k = 150 N/m, what will the velocity of the marble be when it's released?

An object with a mass of 7.03 kg is attached to the lower end of an ideal spring and lowered gently.  If the spring constant of the spring in 520 N/m then how far in meters, did the lower end of the spring move as the object was being lowered?  d=?

A 3 kg block attached to a spring with a spring constant of 9 N/m oscillates horizontally on a frictionless table. Its velocity is 7 m/s when x0 = 0.39 m. What is the block's maximum acceleration (in m/s^2)?