Physics

Consider the motion of the rock in the figure below. What is the minimum speed the rock can have without the string becoming "slack"? (The rock is traveling in vertical circle. Assume that m = 1.6 kg and r = 0.48 m.)

  1. 👍 0
  2. 👎 0
  3. 👁 538
  1. What is the minimum speed the rock can have without the string becoming "slack"? (The rock is traveling in vertical circle. Assume that m = 1.6 kg and r = 0.48 m.)

    1. 👍 0
    2. 👎 0
  2. At the top,

    mv^2/r=mg
    v= sqrt(rg)

    1. 👍 0
    2. 👎 0
    👨‍🏫
    bobpursley
  3. 2.2m/s

    1. 👍 0
    2. 👎 0
  4. Could someone explain how to do this?

    1. 👍 0
    2. 👎 0
  5. the equation is A(c)= v^(2)/r

    solve for v, which is v=[A(c) x r]^(1/2)

    A(c)=9.81, r=radius=.48m, mass is irrelevant.

    solve for v: v= [9.81 x .48]^(1/2)
    v= [4.7088]^(1/2)
    v= 2.169

    1. 👍 0
    2. 👎 0
  6. Mars has two moons, Phobos and Deimos. It is known that the larger moon, Phobos, has an orbital radius of 9.4 106 m and a mass of 1.1 1016 kg. Find its orbital period.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Earth Science

    1. In the classroom during a visual inspection of a rock, a student recorded four statements about the rock. Which statement about the rock is an observation? (1)The rock formed deep in Earth’s interior. (2)The rock cooled

  2. PHYSICS HELP

    A 0.26-kg rock is thrown vertically upward from the top of a cliff that is 31 m high. When it hits the ground at the base of the cliff, the rock has a speed of 29 m/s . a.Assuming that air resistance can be ignored, find the

  3. physics

    A rock is thrown vertically upward with a speed of 14.0 m/s from the roof of a building that is 50.0 m above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? in s What is the

  4. physics

    A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 94.0 kg. The mass of the rock is 0.350 kg. Initially the wagon

  1. College Physics

    In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to

  2. Physics

    A 56 kg rock climber is climbing a "chimney" between two rock slabs as shown in the figure. The static coefficient of friction between her shoes and the rock is 1.02; between her back and the rock it is 0.70. She has reduced her

  3. Physics

    An attacker at the base of a castle wall 3.95 m high throws a rock straight up with speed 5.00 m/s from a height of 1.50 m above the ground. (a) Will the rock reach the top of the wall? (b) If so, what is its speed at the top? If

  4. Physics

    A boy kicks a rock off a cliff with a speed of 19.4 m/s at an angle of 52.5° above the horizontal. The rock hits the ground 5.41 s after it was kicked. a) How high is the cliff? (I found the height to be 60.3 m) b) What is the

  1. physics

    A string under a tension of 50.0 N is used to whirl a rock in a horizontal circle of radius 2.50 m at a speed of 20.4 m/s. The string is pulled in and the speed of the rock increases. When the string is 1.00 m long and the speed

  2. Physics

    A string under a tension of 48 N is used to whirl a rock in a horizontal circle of radius 2.4 m at a speed of 18.48 m/s. The string is pulled in, and the speed of the rock increases. When the string is 1.076 m long and the speed

  3. physics

    A string under a tension of 50.0 N is used to whirl a rock in a horizontal circle of radius 2.50 m at a speed of 20.4 m/s. The string is pulled in and the speed of the rock increases. When the string is 1.00 m long and the speed

  4. physics 100

    Bob, who has a mass of 60 , can throw a 800 rock with a speed of 26 . The distance through which his hand moves as he accelerates the rock forward from rest until he releases it is 1.0 . a) What constant force must Bob exert on

You can view more similar questions or ask a new question.