1. The vector sum of all torques acting on a particle is equal to the time rate of change of the angular momentum of that particle. 2. If the net torque is zero, the angular momentum is conserved. Not that this is a vector quantity and works for each component individually. Angular Momentum Example: direction does the yo-yo move? There is friction between the table and the yo-yo. Suppose the yo-yo is pulled slowly enough that the yo-yo does not slip on the table as it rolls. 1. to the right 2. to the left 3. it won't move 5 Big yo-yo Since the yo-yo rolls without slipping, the center of mass velocity of the yo-yo must satisfy, v cm = rω ... When an object moves while a force is being exerted on it, then work is being done on the object by the force. If an object moves through a displacement d while a constant force F is acting on it, the force does an amount of work equal to W = F·d = Fdcosφ (6.3) where φ is the angle between d and F. Work is also a scalar and has units of 1N · m. Transcript. Cyclists can reach speeds of up to 60km/h, even with many forces acting against them. The main aim for a cyclist is to reduce the amount of air resistance, or drag, that is acting on them. a. Prove the rules given in the notes for the magnitude and direction of C from the deﬁnition in terms of components. Let A and B lie in the x-y plane with A along the x-axis and B having direction with angle relative to A. b. One requires to be the angle between A and B that is no larger than . Why? c. The figure below shows a Yo-Yo of mass m =209 g which has an axle of radius r=1.2 cm and a spool of radius R = 45 cm The Yo-Yo is placed upright on a horizontal plane. The string is pulled with a horizontal force F as shown in the figure What is themaximum magnitude of the pulling force, F, for which the Yo-Yo will roll without slipping? Oct 14, 2019 · A yo-yo, arranged as shown, rests on a friction less surface. When a force Vector F is applied to the string as shown, the yo-yo: A. moves to the left and rotates counterclockwise . B. moves to the right and rotates counterclockwise . C. moves to the left and rotates clockwise . D. moves to the right and rotates clockwise Net force is defined as the overall force acting on an object. When a cat sleeps on a table, the net force on it is zero. When a body is at rest the net force acting on the body is zero.

## Nissan rogue airbag module location

3. Sue whirls a yo-yo in a horizontal circle. The yo-yo has a mass of 0.20 kg and is attached to a string 0.80 m long. Ignore gravity. a) If the yo-yo makes 1.0 revolution/s, what force does the string exert on it? ( 6.32 N) b) If Sue increases the speed of the yo-yo to 2.0 revolutions/s, what force does the string now exert? ( 25.3 N) The resultant or net force on the ball found by vector addition of the normal force exerted by the road and vertical force due to gravity must equal the centripetal force dictated by the need to travel a circular path. The curved motion is maintained so long as this net force provides the centripetal force requisite to the motion. the +Y-direction on the disk: 1) a force 323 N at the edge of the disk on the +x-axis, 2) a force 323 N at the edge of the disk on the —y-axis, and 3) a force 323 N acts at the edge of the disk at an angle = 300 above the —x-axis. hat is the magnitude of the torque on the disk about thez axis due to Fl? 462 IV -m

sufficient friction for the yo-yo to roll without slipping. If the string is pulled to the right as shown, A. the yo-yo rolls to the right. B. the yo-yo rolls to the left. C. the yo-yo remains at rest. D. The answer depends on the magnitude F of the pulling force compared to the magnitude of the friction force. A10.8 F force is the line along which the force vector lies. • The lever arm (or moment arm) for a force is the perpendicular distance from O to the line of action of the force (see figure). • The torque of a force with respect to O is the product of the force and its lever arm. The combination of an applied force and a friction force produces a constant total torque of 36.0 N·m on a wheel rotating about a fixed axis. The applied force acts for 6.00 s. During this time the angular speed of the wheel increases from 0 to 10.0 rad/s. The applied force is then removed, and the wheel comes to rest in 60.0 s.

magnitude of the change in momentum of the ball and of the impulse applied to tb the bat. If the ball remains in contact with the bat for 2.00 milliseconds, find th magnitude of the average force applied by the bat. — (L 1/9.07/ = 7 250 4.) A very heavy SUV collides head-on wit a very lg compact car. Which