physics

posted by .

A ball rolls down a hill mainly because of:

a. an unbalanced torque
b. an unbalanced force
c. its rotational inertia
d. angular momentum

I think it is d - but I am unsure. Any advice?

  • physics -

    gravity

  • physics -

    im apologize, i forgot to put the answer choices. They are:

    a. an unbalanced torque
    b. an unbalanced force
    c. its rotational inertia
    d. angular momentum

    This question really confuses me. Isn't it because the center of gravity for the ball is not over it's base support when on an incline? That is not an answer choice so I am not sure what is correct.

  • physics -

    "......because the center of gravity for the ball is not over it's base support when on an incline? ...."
    --------------------------------
    That is just saying that there is an unbalanced torques :)

  • physics -

    thank you so much. I suppose I did understand it, just looking at it from the wrong perspective.

  • physics -

    Yes, if it were a block sliding you would have said b - an unbalanced force

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A spinning flywheel has rotational inertia I = 402.9 kgm2. Its angular velocity decreases from 20.3 rad/s to zero in 266.6 s due to friction. What is the frictional torque acting?
  2. Physics

    A sanding disk with rotational inertia 1.1 x 10^-3 kg*m^2 is attached to an electric drill whose motor delivers a torque of 6 Nm about the central axis of the disk. What are the following values about the central axis at the instant …
  3. Physics - Angular Momentum

    When the angular momentum changes, the 'change' in the angular momentum vector (ie. dL) is ____. [a.] perpendicular to the torque vector. [b.] parallel to the angular momentum vector. [c.] parallel to the torque vector. .. im confused …
  4. Physics please check

    A uniform solid disk with a mass of 32.3 kg and a radius of 0.414 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk. (a) What is the net torque produced by the two forces?
  5. Physics

    An ice skater, hasa rotational inertia of I = 4 kg m2, and spins at 2 rad/sec. Her rotational inertia then undergoes a change to 2 kg m2. Which of the following is true?
  6. Physics

    A solid sphere of uniform density starts from rest and rolls without slipping a distance of d = 3.4 m down a q = 29° incline. The sphere has a mass M = 3.7 kg and a radius R = 0.28 m. What is the magnitude of the frictional force …
  7. physics

    need some help, A ball with an initial angular velocity of 20.0 rads /s and a rotational inertia of 0.4kgm rolls uphill with an acceleration of -4.00 rad/s . Calculate the net torque acting on the ball. Calculate the angular displacement …
  8. physics

    need some help, A ball with an initial angular velocity of 20.0 rads /s and a rotational inertia of 0.4kgm rolls uphill with an acceleration of -4.00 rad/s . Calculate the net torque acting on the ball. Calculate the angular displacement …
  9. Physics

    A disk with a rotational inertia of 7 kgm^2 rotates like a merry-go-round while undergoing a torque given by (5+2t)Nm. At time 1s, its angular momentum is 5kg m^2/s. what is its angular momentum at 3s?
  10. The Effects of Force

    Question #1: A basketball momentarily changes shape as it bounces off the floor. This is due to balanced forces acting on the ball. a. true b. false According to what I have studied when balanced forces are on an object, that object …

More Similar Questions