Physics

posted by .

Both block A and B mass 3kg and are initially 2m above the ground. They slide down a smooth ramp and then across a rough surface with a speed of 4m/s. How much energy did the block lose due to the friction along the rough surface? AND is transformed into what form of energy?

  • Physics -

    It makes no difference what the mass is or that there are two of them.

    When falling H = 2m, if there were no friction the speed would be sqrt(2gH) = 6.26 m/s, but the speed achieveed is only 4 m/s.

    (4/6.26)^2 = 41% is the fraction of
    energy remaining .
    59% is converted to heat.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    Figure 8-33 shows a 1.50 kg block at rest on a ramp of height h. When the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of …
  2. physics

    A 1.75-kg block is at rest on a ramp of height h. When the block is released, it slides without friction tothe bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 10.0 cm that …
  3. Physics

    Really need help with this asap plz~ there is a 4kg wooden block on top of a wooden ramp forming an angle of 37 degrees above surface.The block is placed 1.2 m up on the ramp and the ramp is connected to another wooden flat board.So …
  4. physics

    I am having great difficulty with this question. A block is placed on a frictionless ramp at a height of 12.5 m above the ground. Starting from rest, the block slides down the ramp. At the bottom of the ramp, the block slides onto …
  5. Physics

    A bullet with a velocity of 200 m/s is shot at a 2-kg block resting on a horizontal frictionless surface. The bullet imbeds in the block and the bullet-block system slides across the surface with a speed of 5 m/s. A) what is the mass …
  6. Physics

    Can someone help me solve this one? I've tried it a few times, but I don't think I'm getting it right. A block of mass M = 2.2 kg starts from rest at a height of 3.6 m on a fixed inclined plane. The coefficient of kinetic friction
  7. physics

    A block of mass 3kg starts from rest and slides down a surface, which corresponds to a quarter of a circle of 1.6m radius. a) if the curved surface is smooth, calculate the speed of the block at the bottom. b) if the block 's speed …
  8. physics

    A 7.4kg block starts 1.2m above the ground, at the top of a frictionless ramp. At the bottom of the ramp is a flat stretch of rough (μk = 0.15) ground 3.0m long. After sliding 3.0m, the ground becomes frictionless, and the block …
  9. physics

    3 kg block (block A) is released from rest at the top of a 20 m long frictionless ramp that is 5 m high. At the same time, an identical block (block B) is released next to the ramp so that it drops straight down the same 5 m. Find …
  10. physics

    A 3 kg block (block A) is released from rest at the top of a 20 m long frictionless ramp that is 5 m high. At the same time, an identical block (block B) is released next to the ramp so that it drops straight down the same 5 m. Find …

More Similar Questions