physics

posted by .

20.) A piano has been pushed to the top of the ramp at the back of a moving van. The workers think it is safe, but as they walk away, it begins to roll down the ramp.
If the back of the truck is 1.5 above the ground and the ramp is inclined at 29, how much time do the workers have to get to the piano before it reaches the bottom of the ramp?

  • physics -

    In the real world, a piano has considerable weight and therefore friction, which would reduce the net force, and acceleration down the plane.

    Ignoring friction,
    weight down the plane mg*cos29.

    weight down the plane=m*a
    a= g*cos29

    vf= sqrt (2ad)=sqrt (2*a*1.5/sin29)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    A crate full of artichokes rests on a ramp that is inclined 10.0° above the horizontal. Give the direction of the normal force and the friction force acting on the crate in each of these situations. (a) The crate is at rest. Normal …
  2. Physics

    A crate full of artichokes rests on a ramp that is inclined 10.0° above the horizontal. Give the direction of the normal force and the friction force acting on the crate in each of these situations. (a) The crate is at rest. Normal …
  3. Physics

    A crate full of artichokes rests on a ramp that is inclined 10.0° above the horizontal. Give the direction of the normal force and the friction force acting on the crate in each of these situations. (a) The crate is at rest. Normal …
  4. Physics

    A piano has been pushed to the top of the ramp at the back of a moving van. The workers think it is safe, but as they walk away, it begins to roll down the ramp. If the back of the truck is 1.3 above the ground and the ramp is inclined …
  5. physics

    If the back of the truck is 1.0 above the ground and the ramp is inclined at 26, how much time do the workers have to get to the piano before it reaches the bottom of the ramp?
  6. physics

    If the back of the truck is 1.5 {\rm m} above the ground and the ramp is inclined at 24{\rm ^{\circ}}, how much time do the workers have to get to the piano before it reaches the bottom of the ramp?
  7. physics

    A piano is being moved into a concert hall up a 15m ramp that has a final height of 1.5m. To help with the weight, a rope has been tied between the piano and a counterweight through two pulleys. One at the top of the ramp and the other …
  8. physics

    A 1.80-kg block slides down a frictionless ramp.The top of the ramp is h1 = 1.21 m above the ground; the bottom of the ramp is h2 = 0.256 m above the ground. The block leaves the ramp moving horizontally, and lands a horizontal distance …
  9. Phyics

    A box of mass 14.0 kg sits on a horizontal steel ramp 4.8 m long with a coefficient of static friction of 0.40 between the ramp and the box. The end of the ramp is slowly lifted until the box begins to slide down the ramp. What angle …
  10. Physics

    You are unloading a refrigerator from a delivery van. The ramp on the van is 5.0m long and its top end is 1.4m above the ground. As the refrigerator moves down the ramp, you are on the downside of the ramp trying to slow the motion …

More Similar Questions