Physics

The weight of the block at rest on a frictionless table is 305 N. This block is attched by a string to another mass that hangs off a frictionless pulley. And the weight of the hanging block is 125 N. Ignoring all frictional effects and assuming the pulley to be massless, find the acceleration of the two blocks. Use g = 10 m/s^2 in all calculations

I do not know what formula to use please help.

asked by Anonymous
  1. F = 125 N
    mass = (125+305)/10 = 43 kg
    a = F/m = 125/43 = 2.9 m/s^2

    posted by Damon
  2. Sum of X forces = T = m1a = (30.5kg*a)
    Sum of Y forces = 125N - T = m2a = (12.5kg*a)

    125N - (30.5kg*a) = (12.5kg*a)
    125N = 43kg*2a
    2.85m/s^2 = 2a
    1.425m/s^2 = a

    posted by Omar

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    a block B (m2 = 14 kg) is at rest on top of a table. Block B is connected to block A (m1 = 4.8 kg) and block C (m3 = 17 kg) by two strings that each pass over a frictionless pulley installed at the either end of the table. The
  2. Physics

    When the three blocks in the figure below are released from rest, they accelerate with a magnitude of 0.370 m/s2. Block 1 has mass M, block 2 has 5M, and block 3 has 5M. What is the coefficient of kinetic friction between block 2
  3. Physics

    ok part (b) A 4.0 kg block is stacked on top of a 12.0 kg block, whcih is accelerating along a horizontal table at a = 5.2 s^-2 m. Let Mu k = Mu s = Mu. (a) What mininum coefficent of friction Mu between the two blocks will
  4. physics

    Can someone please help me solve this: An 7.74g bullet is fired into a 320g block that is initially at rest at the edge of a frictionless table of height h = 1.07 m The bullet remains in the block, and after the impact the block
  5. physics

    A block of mass m = 2.00 kg is released from rest at h = 0.400 m from the surface of a table, at the top of a θ = 35.0° incline as shown below. The frictionless incline is fixed on a table of height H = 2.00 m. (a) Determine
  6. Physics

    A block of mass m = 2.00 kg is released from rest h = 0.500 m from the surface of a table, at the top of a theta = 30.0° incline. The frictionless incline is fixed on a table of height H = 2.00 m. (a) Determine the acceleration
  7. Physics

    Review problem. A block of mass m = 2.00 kg is released from rest at h = 0.500 m above the surface of a table, at the top of a theta = 30.0 incline as shown in Figure 3. The frictionless incline is fixed on a table of height H =
  8. lıfe scıence

    Gıve another name for dıetary fıbre and state two reasons why ıt ıs ımportant ın human nutrıtıon.
  9. Physics

    A 13 kg block(mA) rests on a level table. The coefficient of kinetic friction between the block and the table is .15. A string of negligible mass is attached to the block. The string, which is perfectly horizontal, passes through
  10. Physics

    I have a question 26. A box weighing 85 N rests on a table. A rope tied to the box runs vertically upward over a pully and a weight is hung form the other end. Detrmine the force that the table exerts on the box if the weight

More Similar Questions