A 100-kg block being released from rest from a height of 1.0 m. It then takes it 1.40 s to reach the floor. What is the mass m of the other block

Complete Question

The complete question is shown on the first uploaded image

The mass of the other block is  

Explanation:

From the question we are told that

   Mass of the first block is  

   The height is  

   The time it takes it is  

 Generally from kinematic equation

Here u  is the initial velocity which zero given that it was at rest initially

So

=>  

=>

=>  

Generally from the diagram the resultant force due to the weight of the first object and the tension on the string is  mathematically represented as

=>  

=>  

=>  

Generally from the diagram the resultant force due to the weight of the second object and the tension on the string is  mathematically represented as  

=>  

=>  

=>  

a skateboard rolling across the street - apex