1. A 70 kg adult sits at the end of a 10 m board, on the other end of
... 1. A 70 kg adult sits at the end of a 10 m board, on the other end of which sits a 30 kg child. Where should the pivot be placed so the board (ignore its weight) is balanced? We choose the coordinate system shown, with positive torques clockwise. We write ...
... 1. A 70 kg adult sits at the end of a 10 m board, on the other end of which sits a 30 kg child. Where should the pivot be placed so the board (ignore its weight) is balanced? We choose the coordinate system shown, with positive torques clockwise. We write ...
Linear acceleration of rolling objects Rotational Motion (cont.) R θ
... Tangent to the circle means the component of the velocity that is perpendicular to a line drawn to the center of the circle (all of v, when the trajectory is circular). For this more general case we must decompose the velocity vector into components parallel and perpendicular to the line to the rota ...
... Tangent to the circle means the component of the velocity that is perpendicular to a line drawn to the center of the circle (all of v, when the trajectory is circular). For this more general case we must decompose the velocity vector into components parallel and perpendicular to the line to the rota ...
Work and Kinetic Energy Serway (7.1 – 7.3)
... To prove this, expand A B using the laws of arithmetic (distributive, commutative), and notice that iˆ ˆj ˆj kˆ iˆ kˆ 0 since, i, j, k are mutually perpendicular and iˆ iˆ ˆj ˆj kˆ kˆ 1 since they are unit vectors Physics 1D03 - Lecture 19 ...
... To prove this, expand A B using the laws of arithmetic (distributive, commutative), and notice that iˆ ˆj ˆj kˆ iˆ kˆ 0 since, i, j, k are mutually perpendicular and iˆ iˆ ˆj ˆj kˆ kˆ 1 since they are unit vectors Physics 1D03 - Lecture 19 ...
physics 2008 - Spring Branch ISD
... d. holding a door shut on a windy day so it doesn't blow open 54.In order to do work on an object, the force you exert must be a. the maximum amount of force you are able to exert. b. in the same direction as the object's motion. c. in a direction opposite to Earth's gravitational force. d. quick an ...
... d. holding a door shut on a windy day so it doesn't blow open 54.In order to do work on an object, the force you exert must be a. the maximum amount of force you are able to exert. b. in the same direction as the object's motion. c. in a direction opposite to Earth's gravitational force. d. quick an ...
solutions - UCSB C.L.A.S.
... 10) A merry-go-round is initially rotating at a rate of 1 revolution every 8 seconds. It can be treated as a uniform disk of radius 2 meters and mass 400 kg. A 50 kg child runs toward the merry-go-round at a speed of 5.0 m/s, jumping on to the rim (tangentially, as shown). Find the child’s linear s ...
... 10) A merry-go-round is initially rotating at a rate of 1 revolution every 8 seconds. It can be treated as a uniform disk of radius 2 meters and mass 400 kg. A 50 kg child runs toward the merry-go-round at a speed of 5.0 m/s, jumping on to the rim (tangentially, as shown). Find the child’s linear s ...
Exam One Solutions Problem 1 (25 points): answers without
... Choose the zero point for the electric potential to be at infinity V (∞) = 0 . Determine the electric potential at the point x = a . You may express your answer in terms of any of the quantities mentioned in part (a), whether or not you answered part (a); in particular in terms of k = 1/ 4πε 0 , Q , ...
... Choose the zero point for the electric potential to be at infinity V (∞) = 0 . Determine the electric potential at the point x = a . You may express your answer in terms of any of the quantities mentioned in part (a), whether or not you answered part (a); in particular in terms of k = 1/ 4πε 0 , Q , ...
Momentum and Impulse
... 5. Impulse is defined as the force exerted on an object times the time it lasts. TRUE 6. Automobile seatbelts are used to lengthen the time of impact in case of a collision. TRUE 7. When a baseball player follows through when hitting the ball, the contact time with the ball is longer. TRUE 8. The mo ...
... 5. Impulse is defined as the force exerted on an object times the time it lasts. TRUE 6. Automobile seatbelts are used to lengthen the time of impact in case of a collision. TRUE 7. When a baseball player follows through when hitting the ball, the contact time with the ball is longer. TRUE 8. The mo ...
PSI AP Physics I
... the surface as you can? When you want to keep a door open, you place a door stop between the bottom of the door and floor. Where do you place the door stop (in terms of its distance from the door hinges) and why? 10. Torque is expressed in Newton meters. Energy is expressed in Joules. These units ar ...
... the surface as you can? When you want to keep a door open, you place a door stop between the bottom of the door and floor. Where do you place the door stop (in terms of its distance from the door hinges) and why? 10. Torque is expressed in Newton meters. Energy is expressed in Joules. These units ar ...