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jaimie r
jaimie r asked in Science & MathematicsPhysics · 8 years ago

Finding the Height of a Wedge?

A small block of mass m1 = 0.5 kg is released from rest at the top of a curved wedge of mass 7.0 kg, which sits on a frictionless horizontal surfac. When the block leaves the wedge, its velocity is measured to be 4.8 m/s to the right, as in Figure P6.59b. (a) What is the velocity of the wedge after the block reaches the horizontal surface?

I found the answer to A) and it is -0.343 m/s

PART B) ... what is the height of the wedge?

I cannot figure out part B... I tried using

mgh= 1/2 mv^2 and I got a height of 1.7 meters... this is incorrect and I am clueless :(

Thanks in advance for the help! :D

1 Answer

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  • peterpan
    Lv 7
    8 years ago
    Favorite Answer

    a)

    m1v1=-m2v2

    v2=-v1m1/m2

    v2=-0.34 m/s

    b)

    m1gh=1/2m1v1^2+1/2m2v2^2

    h=(v1^2+v2^2)/(2m1g)

    h=2.36 m

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