A block is being pulled by two ropes. One with a tension of 9N and the other with a tension of 3N. It accelerates at a rate of 0.56m/s^2. What is the mass!

accelerates-rate

#1

A block is being pulled by two ropes. One with a tension of 9N and the other with a tension of 3N. It accelerates at a rate of 0.56m/s^2. What is the mass?

Answer:

Assuming the ropes are pulling in the same direction you add the forces and use the F = ma equation
3 + 9 = m * 0.56
m = 21.429 kg