Question

1a.  a box of dirty money (mass m₁ = 3.5 kg) on a frictionless plane inclined at angle θ₁ = 37°. The box is connected via a cord of negligible mass to a box of laundered money (mass m₂ = 1.3 kg) on a frictionless plane inclined at angle θ₂ = 54°. The pulley is frictionless and has negligible mass. What is the tension in the cord?

1b. three blocks attached by cords that loop over frictionless pulleys. Block B lies on a frictionless table; the masses are m_A = 7.00 kg, m_B = 9.30 kg, and m_C = 15.0 kg. When the blocks are released, what is the tension in the cord at the right? Use g=9.80 m/s².

1c. A 3 kg particle moves along an x axis, being propelled by a variable force directed along that axis. Its position is given by x = 2 m + (3 m/s)t + ct² - (2 m/s³)t³ with x in meters and t in seconds.The factor c is a constant. At t = 4 s the force on the particle has a magnitude of 30 N and is in the negative direction of the axis. What is c?

Answer 1