Physics Mastered – Master Physics

Category: General Physics

  • How to get the average velocity if the angle, distance and time are given?

    Distance=2 Time=1.17 seconds Angle= 30 degrees What is the Average Velocity?   = v = 2/1.17 = 1.7 m/sec 30 degrees, northeast  

  • A pencil sharpener takes 1.4 seconds to go from its maximum speed of 8π rad/s to rest.

    A pencil sharpener takes 1.4 seconds to go from its maximum speed of 8π rad/s to rest. How many rotations will the pencil sharpener make before it stops? Starting from rest. A DVD takes 0.2 seconds to get its maximum rotational velocity of 14π r radiant per second. What is the angular acceleration of the DVD? Jordan…

  • A 18.1-kg block and a 32.6-kg block are resting on a horizontal frictionless surface.

    A 18.1-kg block and a 32.6-kg block are resting on a horizontal frictionless surface. Between the two is squeezed a spring (spring constant = 1580 N/m). The spring is compressed by 0.160 m from its unstrained length and is not attached permanently to either block. With what speeds do (a) the 18.1-kg block and (b)…

  • What is the Average Velocity of the Ball?

    A tennis ball with a velocity of 11.4 m/s to the right is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a velocity of -10.1 m/s to the left. If the ball is in contact with the wall for 0.011 seconds, what is the average velocity…

  • Torque and Angular Acceleration

    Learning Goal: To understand and apply the formula τ =Iɑ to rigid objects rotating about a fixed axis. To find the acceleration ɑ of a particle of mass m, we use Newton’s second law: , where  is the net force acting on the particle. To find the angular acceleration ɑ of a rigid object rotating about a fixed axis, we can use a similar formula: τnet…

  • Torque Magnitude Ranking Task

    The wrench in the figure has six forces of equal magnitude acting on it. A) Rank these forces (A through F) on the basis of the magnitude of the torque they apply to the wrench, measured about an axis centered on the bolt. =>

  • Playing in the Field

    Four children are playing in a field. The children form a line, holding hands. The player at the front of the line starts to spin around faster and faster, causing the others to run in circle, as shown in the figure. A) While the line of children is rotating, which of the following statements are…

  • Pivoted Rod with Unequal Masses

    The figure shows a simple model of a seesaw. These consist of a plank/rod of mass mr and length 2x allowed to pivot freely about its center (or central axis), as shown in the diagram. A small sphere of mass m1 is attached to the left end of the rod, and a small sphere of mass m2 is attached to the…

  • Net Torque on a Pulley

    The figure below shows two blocks suspended by a cord over a pulley. The mass of block B is twice the mass of block A, while the mass of the pulley is equal to the mass of block A. The blocks are let free to move and the cord moves on the pulley without slipping…

  • Linear and Rotational Quantities Conceptual Question

    A merry-go-round is rotating at constant angular speed. Two children are riding the merry-go-round: Alan is riding at point A and Isamu is riding at point B. A) Which child moves with greater magnitude of velocity? => Isamu has the greater magnitude of velocity. B) Who moves with greater magnitude of angular velocity? => Both…