Physics Please check my answers

It's possible for a body to have both rotational and translational motion at the same time.
True. <<


2. The moment of inertia of an object would be different on the surface of the earth than on the surface of the moon.

True. <<


3. The moment of inertia is the rotational equivalent of mass.

False. <<

4. The direction of torque is always parallel to the force and the moment arm.

True. <<


5. Torque is a scalar.


False. <<

6. When you push on a door to open it, it always requires the same torque no matter where you push.


False. <<

7. If the line of action of a force is directly through the axis of rotation, you have the maximum torque.
False. <<

8. If a system is in rotational equilibrium, the sum of all torques has to be positive?

True. <<


  1. 👍 0
  2. 👎 0
  3. 👁 129
asked by Chelsea
  1. Gulp - re-read chapter !
    1. right sure, rolling ball
    2. wrong, m r^2 does not change on Moon
    3. wrong true, Moment = I alpha is F = m A
    4. No, false , cross product perpendicular to both
    5. right, vector
    6. wrong, true, hinge works on torque (unless the latch is stuck :)
    7. right
    8. wrong, sum of moments (torques) is zero for equiblibrium (constant angular momentum)

    1. 👍 0
    2. 👎 0
    posted by Damon

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    Equate the increase in potential energy at the higher elevation, M g H, to the decrease in kinetic energy. Make sure you include the kinetic energy of rotation, which is (1/2) I w^2. For a sphere of radius R, V = R w and I =(2/5)

    asked by drwls on March 21, 2007
  2. physics help 4 please!

    A solid disk (mass = 1 kg, R=0.5 m) is rolling across a table with a translational speed of 9 m/s. a.) What must the angular speed of the disk be? ? rad/s b.) What is the rotational KE of the disk? ? J c.) What is the total KE of

    asked by kelsey on October 18, 2008
  3. Physic (concepts-please check my thoughts)

    A net torque applied to a rigid object always tends to produce? a)translational acceleration b) rotational equilibrium c) rotational acceleration d) rotational inertia e) none of these work (c) Torque produces torsion and tends to

    asked by Diane on December 10, 2006
  4. PHYSICS 3

    A solid disk (mass = 1 kg, R=0.5 m) is rolling across a table with a translational speed of 9 m/s. a.) What must the angular speed of the disk be? rad/s d.) The disk then rolls up a hill of height 2 m, where the ground again

    asked by kelsey on October 20, 2008
  5. physics

    A yo-yo has a rotational inertia of 810 g·cm2 and a mass of 95 g. Its axle radius is 2.6 mm and its string is 100 cm long. The yo-yo is thrown so that its its initial speed down the string is 1.0 m/s. (a) How long does the yo-yo

    asked by Help Please! on January 23, 2011
  6. Physics

    A wheel with radius R, mass m, and rotational inertia I rolls without slipping across the ground.  If its translational kinetic energy is E, what is its rotational kinetic energy?

    asked by John on March 19, 2011
  7. physics

    A bowling ball encounters a 0.76m vertical rise on the way back to the ball rack. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. If the translational speed of the ball is 3.80m/s at the

    asked by Cavin on March 28, 2007
  8. physics

    What kind of motion does a constant, non zero torgue produce on an object mounted on an axle: choices constant rotational speed, constant rotational acceleration, increasing rotational acceleration or decreasing rotational

    asked by mike on June 20, 2010
  9. Physics

    A sphere of radius 20 cm and mass 1.2 kg rolls without slipping down a 30 degree incline that is 10 m long. a) Calculare the translational and rotational speeds of the sphere when it reaches the bottom. Assume it starts from rest,

    asked by Alley on April 20, 2010
  10. phys

    A disk rolls down a slope. It rotational axis is its center of mass. It is rotation at a constant angular speed making 34.0 full revolutions in a time interval of 3.30 s. 1)What is the rotational inertia of the disk if its mass is

    asked by ami on December 7, 2009

More Similar Questions