
3. A 0.5 kg object moves along a straight line. The net force acting on the...
If a single constant force acts on an object that moves on a straight line, the object's velocity is a linear function of time. The equation v=vi + at gives its velocity v as a function of time, where a is its constant acceleration. What if velocity is instead a linear function of position? Assume that as a particular object moves through a resistive medium, its speed decreases as described by the equation v = vi-vx, where k is a...
(Figure 1) shows the force acting on a 4.5 kg object as it moves along the r-axis. The object is at rest at the origin at 10s. What are its acceleration and velocity at t = 6s? Part A What is its acceleration at 6 s? Express your answer with the appropriate units. a Value Units Submit Request Answer Figure < 1 of 1 > Part B What is its veloocity at 6 s? Express your answer with the appropriate...
For a moving object, the force acting on the object varies directly with the object's acceleration. When a force of 28 N acts on a certain object, the acceleration of the object is 7 m/s . If the force is changed to 36 N, what will be the acceleration of the object? ola x X 6 ?
A 2.0 kg object moves along the x-axis under the influence of an unknown force. Its potential energy due to the force is U(x) = ax4 + bx2 , where a = 2.5 J/m4 and b = 12 J/m2 a) What is the force on the object when x = 0.5 m? b) If the object is released from rest at x = 0.5 m, what is its velocity when it crosses the origin?
3. The net force acting on a 2.0-kg particle as it is pushed along a horizontal floor (considered along the positive x-axis) varies as shown on the given chart. The velocity of the object at x = 1 m is 3.0 m/s. (a) Find the total work done on the crate along F (N) the floor from x-0 to x-3 m. (b) Estimate the final velocity of the particle at x 3 m. 0 r (m) [(a) -2J; (b) 1.73...
A force moves an object along an x axis. If the magnitude of the force varies from point to point, can the work be calculated by taking the dot product of the force and the displacement? yes no
5. (15 pts] A force acting on an object is proportional to the square root of the distance the object moves. The equation for the distance r is: 19 = kyr, for some constant k. The object starts at t=0 with position r = 0 and velocity v = 0. The object moves four meters in the first second. That is, r(t = 1) = 4. (a) Find the object's velocity as a function of position, v(r). (b) Find the...
A 100 kg object experience a net force of (120i+140j) N, it is initially at rest, and its position starts at the origin. What is the object's acceleration? After 4 seconds, what is the velocity of this object? What is its position after 5 seconds (x,y), distance from the origin and angle defined from the positive x-axis?
An object is propelled along a straight-line path in space by a force. If the mass of the object somehow becomes twice as much, its acceleration a) doubles b) halves c) stays the same d) quadruples The Newton is a unit of a) force b) mass c) density d) inertia An object's weight may properly be expressed in a) meters per second b) newtons c) kg d) none of the above
A car starts from rest and moves along a straight line with an acceleration of a =10x(-1/5) m/s where x is in meters. Determine the cars position and velocity when = 4.481 s. X(4.481) V(4.481) =