Is My Kinematics Problem-Solving Approach Correct?

[chrisfnet]

I was wondering, given my solutions and the problem statements; if someone could look over my work to see if there are any incorrect solutions/processes.

Thanks!

 

[chrisfnet]

Problem 1

A ball is fired from a height of 3.0m above the ground, with a speed of 13m/s and an angle of 22 below horizontal. At what time does the ball hit the ground? What is the impact velocity?

Problem 2

A 28kg sign is suspended by two massless cables. Find the tension in each.

Problem 4

In the setup shown, m1 = 0.30kg, m2 = 0.45kg and theta = 11. Also, between the first block and incline, mu = 0.40. Assume the system moves so that the first block slides up the incline. What is the acceleration of the system? What is the tension in the string?

 

[tomcue]

I am happy to review your work and provide feedback on your solutions and processes. It is always important to have a second set of eyes look over scientific work to catch any potential errors or areas for improvement. It is also helpful to have someone with a fresh perspective review your work to ensure that your solutions and processes are clear and logical.

In order to provide the most accurate feedback, please provide me with the problem statements and your solutions. I will carefully review them and provide any necessary feedback or suggestions. It is also helpful if you can explain your thought process and any assumptions you made while solving the problems.

Remember, science is all about accuracy and precision, so it is important to double check your work and make sure your solutions are supported by solid reasoning and evidence. I look forward to reviewing your work and helping you improve your problem-solving skills. Keep up the good work!