A box of mass m2 = 1 kg on a frictionless plane inclined at angle θ = 30°. It is connected by a cord of negligible mass to a box of mass m1 = 3 kg on a horizontal frictionless surface. The pulley is frictionless and massless.(adsbygoogle = window.adsbygoogle || []).push({});

m1 O

---------------------\

\

-------------------30 \ m2

----------------------- \

(a) If the magnitude of horizontal force is 2.3 N, what is the tension in the connecting cord?

(b) What is the largest value the magnitude of may have without the cord becoming slack?

m1

F+T=m1a

2.3+T =3a

m2

sin30 m2g - T = m2a

4.9-T=a

substitution

2.3+T = 3(4.9-T)

4T = 12.4-2.3

T = 3.1N

I'm not sure if this is correct, can somebody verify this for me and give me a hint on how to do part b)?

thanks in advance

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Mass on an incline + Pulley

**Physics Forums | Science Articles, Homework Help, Discussion**