Physics, 06.09.2021 03:50 Amazingdolannn
Which of these systems is NOT an “isolated system” to which conservation of momentum can be applied?
1. A billiard ball collides with another billiard ball on a level pool table. (Ignore friction with the table during the instant of the collision.) System: the two balls
2. A ball falls freely toward the ground. (Ignore air friction.) System: the ball and the earth
3. All of these in fact are isolated systems.
4. A single car slips on an icy road. (Friction with the ice is negligible.) System: the car
5. Two cars slipping on an icy road collide with one another. (Friction with the ice is negligible.) System: the two cars
6. A ball falls freely toward the floor. (Ignore air friction.) System: the ball
7. Two masses connected by a spring oscillate on a frictionless tabletop. System: the two masses and the spring
Answers: 3
Physics, 22.06.2019 11:50
The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].
Answers: 3
Which of these systems is NOT an “isolated system” to which conservation of momentum can be applied?...
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