1) Ans: (b) a net torque to the object.
A net torque applied to an object will lead to a change in the angular momentum of that object.
1. In order to change the angular momentum of an object, it is necessary to apply...
We have three vectors, labeled A, B, and C. A points due west, B points due north, and C points due east. We don't know their relative magnitudes. We find the cross product of each of these vectors with a vector w ich points due south D). ank the three cross products × , В x , x ) om s a est to argest inter ns otte rvertica com ponent taking esign or he component nto account. O g...
HW Problems Chapter 1 ASSIGNMENT 2 1. Vector A has a magnitude of 25 units and points due west, while vector B has a magnitude of 60 units and points due south. Using graphical method of vector addition to find the magnitude and direction of (a) A and (b) A- B. Specify the directions relative to due east. 2. A vector has a magnitude of 10 units and makes at an angle of 240 with the positive x axis. Draw...
6. Angular Momentum and Torque on a Meteor A meteor enters Earth's atmosphere and is observed by someone on the ground before it burns up in the atmosphere. The vector 25 m i +25 m j gives the position of the meteor with respect to observer. At the instant the observer sees the meteor, it has linear momentum p 1.5 kg -2.0) m/s 3 and it is accelerating at a constant rate of 2.0 m/s(-3) along its path, which for...
Tutorial: Angular Momentum and Torque III. Angular Momentum The angular momentum of a point particle is defined by: L = ixp. Here, is a vector that points from the point of rotation (or point around which the angular momentum is calculated) to the location of the particle and p = mb is the linear momentum of the particle. A Your little brother Joey is playing with his toy airplane. The airplane is tied to a string and its motor makes...
Question 7. and Angular Momentum e magnitudes of the torques they roduce on the particles about the ori- in, greatest first. is tne ner torque on tne parucie (aj zero, (o) posiive ana con- stant, (e) negative and increasing in magnitude (>0), and (d) negative and decreasing in magnitude (t> 0)? What happens to the initially sta- onary yo-yo in Fig. 11-25 if you pull it ia its string with (a) force & (the line f action passes through the...
An object moves in a circular path with constant angular speed. Compare the direction of the object's tangential velocity vector to its centripetal acceleration vector. A) Both vectors point in the same direction B) The vectors point in opposite directions C) The vectors are perpendicular D) Impossible. The acceleration is zero. Two objects with masses m1 and m2 are original a distance r apart. The magnitude of the gravitational force between them is F. if BOTH masses are doubled, and...
Under what conditions, is linear momentum conserved? Check all that apply. a. There are no frictional forces. b. The work done is positive. c. The net torque is minimal. d. The net force vanishes. e. The action of the force is instantaneous.
Four forces act on an object, given by A = 50.3 N east, B = 39.3 N north, C = 90.7 N west, and D = 78.7 N south. (Assume east and north are directed along the +x-axis and +y-axis, respectively.) HINT (a) What is the magnitude of the net force (in N) on the object? (b) What is the direction of the force? (Enter your answer in degrees counterclockwise from the +x-axis.) o counterclockwise from the +x-axis
1. Which object has the least momentum? Object A: m = 1kg, v = 100m/s Object B: m = 10kg, v = 12m/s Object C: m = 0.5kg, v = 1000m/s Object D: m = 100kg, v = 2m/s 2. If a 54 Ns impulse (recall, impulse is force*time, so it is measured in Newtons*seconds) is given to a 6kg object, then the trasnfer of momentum is. a. 6 Ns b. 9 Ns c. 54 Ns d. 324 Ns
42.0 kg boy is sliding on a horizontal, frictionless surface with an initial momentum towards east. His momentum has magnitude 87.0 kg⋅m/s. Starting at 0 s, a net force with magnitude F=( 8.00 N/s )t and direction due west is applied to the boy. a)At what value of t does the boy have a westward momentum of magnitude 61.0 kg⋅m/? b)How much work has been done on the boy by the force in the time interval from t=t= 0 s...