phys 220

Most popular questions and responses by phys 220
  1. physics

    Estimate the change in gravitational potential energy when a person with mass 95kg rise from bed to a standing position. Assuming that the center of mass of a person is elevated by approximately Δh=0.50m.

    asked on February 21, 2015
  2. Physics

    A group of students observes that a wooden block (m = 0.40 kg) on the end of a string with a radius of 0.7 meters makes 9 rotations in 20.7 seconds when twirled. a)What is the block's tangential (linear) speed? b)What is the block's angular speed?

    asked on February 16, 2015
  3. physics

    A group of students observes that a wooden block (m = 0.40 kg) on the end of a string with a radius of 0.7 meters makes 5 rotations in 20.7 seconds when twirled. 1)Calculate the centripetal acceleration of the wooden block: 2)Calculate the tension in the

    asked on February 16, 2015
  4. physics

    A 3.9kg block moving at 2.0 m/s toward the west on a frictionless surface has an elastic head-on collision with a second 0.80kg block traveling east at 3.0 m/s. a)Determine the final velocity of first block. Assume due east direction is positive.

    asked on February 21, 2015
  5. Physics

    Express the angular velocity of 36 rpm (revolutions per minute) in units of radians per second (rad/s).

    asked on February 16, 2015