Phyiscs

posted by .

A lbock is given an intial speed of 4.0 s^-1 m up the 22 degree plane

How far up the plane will it go
ok I got this to be something like 2.2 about i understand this

i need help on this
how much time elapses before it returns to tis starting point? Ignore friction.
ok I need to know what formula to use to rearange for time

i thought it was this

x = 2^-1 a t^2 + Vo t + Xo

if i'm right then i guess I do not know how to rearange this for time because ther's a t^2 and t so could show me how to rearange this for time

thanks

  • Phyiscs -

    Vo is zero, starting at the top.

    T= sqrt(2x/g) where g is the component of gravity down the plane 9.8sin22

  • Phyiscs -

    If the plane is frictionless, the block will rise a vertical height h so thet mgh equals the initial kinetic energy (1/2) mV^2. Thus h = V^2/(2g) = 0.81 m. The distance x that the block mov es up the track is h/sin22 = 2.2 m

    So your answer is correct.

    The block decelerates at a rate
    a = g sin 22 = 3.67 m/s^2.
    The block reaches maximum height when
    t = V/a = 4/3.67 = 1.1 s
    It takes the same length of time to come back down. The total e;apsed ti9me to return is thus 2.2 s

    You could also solve
    y = V t - (a/2) t^2 = 0
    to get the answer. Ignore the t=0 solution.
    t = 8/a = 2.2

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    Ok I asked this question before A lbock is given an intial speed of 4.0 s^-1 m up the 22 degree plane How far up the plane will it go ok I got this to be something like 2.2 about i understand this i need help on this how much time …
  2. Physics

    My question is A block is given an intial speed of 4.0 s^-1 m up the 22 degree plane How far up the plane will it go?
  3. physics B

    A block is given n intial speed of 3.0 s^-1 m up the 22.0 degree plane (a) How far up the plane will it go?
  4. Physics

    for some reason I keep on getting 1.2 seconds for (b) and .86 m for (a) The back of the book has the same answers for (a) but has 1.5 seconds for (b) i do not see what I'm doing wrong. Can someone confirm that I'm wrong or right?
  5. math

    Given the plane 2x-3y+7z=4, a) Find the equation for the line perpendicular to the plane that intersects the plane at the point P=(6,5,1). b) How far is it from the point (4,-2,3) to the plane?
  6. physics

    A crate is given an initial speed of 2.9 up the 29 plane shown in the figure . Assume = 0.13 how far up the plane will it go?
  7. Physics

    A crate is given an initial speed of 3.1 m/s up the 29 degree plane shown in the figure . Assume coefficient of friction = 0.17. How far up the plane will it go?
  8. Science

    A coffin is given an initial speed of 4.4 m/s up the 17.8ยบ inclined plane with a coefficient of kinetic friction of 0.4. How far up the plane will it go?
  9. Physics

    A 20 kg box approaches the foot of a 30 degree inclined plane with a speed of 10 m/s. the coefficient of friction between the box and the inclined plane is 0.2. (a) How far up the inclined plane will the box go?
  10. PHYSICS

    a block is given an initial velocity of 3 m/s up the 22 degree plane. A.) How far up will the plane go B.) How much time elapses before it returns to its starting point. IGNORE FRICTION A) I got 1.2m B.) I got 1.6s I'm confused on …

More Similar Questions