Quiz 21
The angular speed of the car's tires is larger than the angular speed of the tractor's tires.
A passenger car that has tires with radius = 0.3 m travels along a highway. The car pulls alongside a tractor-trailer that has tires with radius = 0.6 m and moves with the same velocity. If the tires roll without slipping, which of the following statements is correct? The angular speed of the car's tires is smaller than the angular speed of the tractor's tires. The angular speed of the car's tires is equal to the angular speed of the tractor's tires. The angular speed of the car's tires is larger than the angular speed of the tractor's tires.
0.25 m/s
A wheel has a radius of 0.5 m and rotates with an angular speed of 0.5 rad/s. If the wheel rolls without slipping, what is the center-of-mass speed? 0.5 m/s 1.0 m/s 0 m/s 0.25 m/s
all constituent particles of the body share the same velocity as the center-of-mass.
For translational motion of a rigid body, all constituent particles of the body share the same velocity as the center-of-mass. the velocities of constituent particles depend on their locations in the body. the center-of-mass cannot move. only the center-of-mass has a velocity.
must have contributions from its translational and rotational motions.
The kinetic energy of an object that rolls without slipping is equal to twice the kinetic energy of its rotational motion. is equal to twice the kinetic energy of its linear, center-of-mass motion. is determined only by the rotational motion of the object. is determined only by the linear motion of its center-of-mass. must have contributions from its translational and rotational motions.
Cyclist A is pedaling harder than B, so that her tires have larger ω.
Two bicyclists are riding together, each with the same speed. Cyclist A's bike has tires that are smaller than those on cyclist B's bike. As long as the tires are rolling without slipping, which of the following must be true? Cyclist A is pedaling easier than B, so that her tires have smaller ω. Cyclist A is pedaling harder than B, so that her tires have larger ω. Cyclist A is pedaling with the same intensity as B, so that their tires have the same ω.
every particle in the body has to move with the same angular speed.
When describing the rotational motion of a rigid body, every particle in the body has to move away from the center of the circular motion. every particle in the body has to move with the same angular speed. every particle in the body has to move with the center-of-mass velocity. every particle in the body has to move with the same tangential speed.
Your angular momentum will increase if you increase your tangential speed.
You are driving a car around a circular track. Which of the following statements are true? Your angular momentum will be unchanged if you change your tangential speed. Your angular momentum will decrease if you increase your tangential speed. Your angular momentum will increase if you decrease your tangential speed. Your angular momentum will increase if you increase your tangential speed.