A 1.5 kg crate falls from a height of 2.0 m onto an industrial spring scale with a spring constant of 1.5 O 105 N/m. At its greatest compression the reading on the scale is: O a. 3.0 x 103 N O b. 2.1 x 103 N Ос 15 х 103 N O d. 15 N O e. 30 N

A 31.0 cm long spring is hung vertically from a ceiling and stretches to 36.9 cm when an 8.00 kg mass is hung from its free end. a. Find the spring constant (in N/m). b. Find the length of the spring (in cm) if the 8.00 kg weight is replaced with a 185 N weight.

A spring with spring constant k=600 N/m is compressed by 10 cm and launches a ball vertically into the air. The mass of the ball is 2.0 kg. Determine how high the ball will be launched.

1. Consider the setup shown below: a block with mass m; sits on a table with friction coefficient u between the table and itself, attached on one side to a spring with stiffness k, and on the other side to a cord with negligible mass that wraps over a frictionless pully and supports a second block with mass m2 that's suspended in the air over the edge of the table. The friction between block 1 and the table is not enough to hold up block 2 so that, when it's released from rest, the spring stretches a distance Ax before the system comes to rest. a. Draw and label a free-body diagram for each block. (Use the gridlines to make sure that the relative lengths of your vector arrows are correct.) k m1 block 1: block 2: m2 b. What is the kinetic friction coefficient between block 1 and the table?