When you ride a bicycle, in what direction is the angular velocity of the wheels

Question

When you ride a bicycle, in what direction is the angular velocity of the wheels? A) to your left B) to your right C) forwards D) backwards E) up If two forces of equal magnitude act on an object that is hinged at a pivot, the force acting farther from the pivot must produce the greater torque about the pivot. A) true B) false C) unable to decide without knowing the shape of the object If an irregularly shaped object (such as a wrench) is dropped from rest in a classroom and feels no air resistance, it will A) accelerate but will not spin. B) accelerate and turn until its center of gravity reaches its lowest point. C) accelerate and turn about its center of gravity with uniform angular speed. D) accelerate and turn about its center of gravity with uniform angular acceleration. E) accelerate and spin until its center of gravity reaches its highest point. A tire is rolling along a road, without slipping, with a velocity v. A piece of tape is attached to the tire. When the tape is opposite the road (at the top of the tire), its velocity with respect to the road is A) 2v. B) v. C) 1.5 v. D) zero. E) The velocity depends on the radius of the tire. Consider a uniform solid sphere of radius R and mass M rolling without slipping. Which form of its kinetic energy is larger, translational or rotational? A) Its translational kinetic energy is larger than its rotational kinetic energy. B) Its rotational kinetic energy is larger than its translational kinetic energy. C) Both forms of energy are equal. D) You need to know the speed of the sphere to tell. A solid sphere, solid cylinder, and a hollow pipe all have equal masses and radii and are of uniform density. If the three are released simultaneously at the top of an inclined plane and roll without slipping, which one will reach the bottom first? A) solid sphere B) hollow pipe C) solid cylinder D) They all reach the bottom at the same time.

Explanation / Answer

use right hand rule for this if your curl your fingers in the direction of the rotation then your thumb will points out the direction of the angular velocity which is perpendicular to the plane of rotation. so in the case of bicycle the wheel rotates clockwise and the wheel is straight on the road so the direction of angular velocity will be left.

True - Torque =Force*distance

the greater the distance more will be the torque , think of why the handpumps have long handle because it generates more torque so that we can lift the water easily...

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