1. Two blocks, mass 𝑚 1 =15 kg and 𝑚 2 =5 kg are sitting on a frictionless table connected by a string. It is known that the string will break if the tension is greater than 10 N. A force 𝐹 is applied to the block with mass 𝑚 1 as shown in the drawing. What is the maximum value of 𝐹 before the string breaks?
𝑚 2
𝑚 1 𝐹

2. Answer Choices
40 N
20 N
10 N
15 N
5 N

3. Two blocks, mass 𝑚 1 =0. 5 kg and 𝑚 2 =0
Two blocks, mass 𝑚 1 =0.5 kg and 𝑚 2 =0.125 kg are attached to a pulley as shown. The pulley is connected to the ceiling by another length of string. The pulley and string are all massless, and the pulley is frictionless. What is the tension in the string connecting the pulley to the ceiling? Note: Take 𝑔=10 m/ s 2 .
𝑚 1
𝑚 2

4. Answer Choices
2 N
3.75 N
4 N
6.25 N
0 N