Physics (Rolling)

posted by .

In Fig. 11-35, a solid brass ball of mass m will roll smoothly along a loop-the-loop track when released from rest along the straight section. The circular loop has radius R, and the ball has radius r << R. (a) What is h if the ball is on the verge of leaving the track when it reaches the top of the loop? (b) If the ball is released at height h = 6R, what is the magnitude of the horizontal force component acting on the ball at point Q? State your answers in terms of the given variables, using g where applicable.

Figure: i.imgur. com/ WvU4V.gif
(remove spaces)

  • Physics (Rolling) -

    first, at the top of the loop, centripetal force <= mg

    centriptal force= m v^2/R where v= wR
    = m w^2 * R

    but rolling energy + Kinetic energy+ potential energy at the top has to be = mgh

    so work that out to find h. For I of the solid ball, I= 2/5 mr^2

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics - KE/rotation

    In Figure 11-32 (which shows a ball at the top of an incline, at the bottom of the incline a loop begins with radius R and Q a point on the loop lined up with the center of the loop), a solid brass ball of mass m and radius r will …
  2. Physics - KE

    In Figure 11-32 (which shows a ball at the top of an incline, at the bottom of the incline a loop begins with radius R and Q a point on the loop lined up with the center of the loop), a solid brass ball of mass m and radius r will …
  3. Physics - KE

    In Figure 11-32 (which shows a ball at the top of an incline, at the bottom of the incline a loop begins with radius R and Q a point on the loop lined up with the center of the loop), a solid brass ball of mass m and radius r will …
  4. AP Physics

    A small solid marble of mass m and radius r will roll without slipping along the loop-the-loop track if it is released from rest somewhere on the straight section of the track. For the following answers use m for the mass, r for the …
  5. physics

    A 4.74 kg spherical ball with radius 1.4 cm rolls on a track with a loop of radius 39 cm that sits on a table 1.2 meters above the ground. The last 1 meter section of the track is horzontal and is not connected to the rest of the track. …
  6. Physics

    A massless spring of constant k = 91.0 N/m is fixed on the left side of a level track. A block of mass m = 0.50 kg is pressed against the spring and compresses it a distance of d. The block (initially at rest) is then released and …
  7. Physics

    I THINK SOMEONE HAS THIS SAME QUETION! A massless spring of constant k = 91.0 N/m is fixed on the left side of a level track. A block of mass m = 0.50 kg is pressed against the spring and compresses it a distance of d. The block (initially …
  8. Physics

    A solid brass ball of mass 9.5 g will roll smoothly along a loop-the-loop track when released from rest along the straight section. The circular loop has radius R = 4.2 m, and the ball has radius r << R. (a) What is h if the …
  9. Physics URGENT!!!

    : A massless spring of constant k =84.8 N/m is fixed on the left side of a level track. A block of mass m = 0.5 kg is pressed against the spring and compresses it a distance d, as in the figure below. The block (initially at rest) …
  10. physics

    A massless spring of constant k =60.9 N/m is fixed on the left side of a level track. A block of mass m = 0.7 kg is pressed against the spring and compresses it a distance d, as in the figure below. The block (initially at rest) is …

More Similar Questions