F (10pts) An object with a mass of 0.25 kg has an initial speed of v=-3...

Question

Question

F (10pts) An object with a mass of 0.25 kg has an initial speed of v=-3 m/s. Two different forces are applied to the mass at

Answer 1

Answer #1

The acceleration of the object from t=0 to t=3 s

ax=Fx/m =4.0N/0.25 =16m/s^2

Using equation of the motion

v=v_i +a_x t

Here vi= -3m/s , ax =16m/s/s t=3.0s

v=-3+16*3 = 45 m/s

The acceleration of the object from 3s to 5s

ax =Fx/m =-2/0.25 =- 8m/s/s

Using equation of the motion

v_f =v+a_x t

v_f =45-8.0*2

. Answer

Add a comment

Answer 2

Similar Homework Help Questions

Calculate the final speed of an object if its initial speed is 10 m / s....

Calculate the final speed of an object if its initial speed is 10 m / s. The object has a mass of 5 kg. Initially, it has a height of 20 meters, and it goes down to a height of 15 m. There are no dissipative forces on the object.
An object (A) of mass m A = 29.0 kg is moving in a direction that...

An object (A) of mass m A = 29.0 kg is moving in a direction that makes angle of 40° north of east with a speed v A = 5.10 m/s, while object (B) of mass m B = 17.5 kg is moving due north with a speed v B = 7.85 m/s. The two objects collide and stick together in a completely inelastic collision. Find the magnitude of the final velocity of the two-object system after the collision. An...
Object A has mass mA = 9 kg and initial momentum PA = < 15,-8,0 >...

Object A has mass mA = 9 kg and initial momentum PA = < 15,-8,0 > kgm/s, just before it strikes object B, which has mass mg = 12 kg. Just before the collision object B has initial momentum 8,1 = < 4,7,0 > kg. m/s. Consider a system consisting of both objects A and B. What is the total initial momentum of this system, just before the collision? sysj = (19,-1,0) kg.m/s The forces that A and B exert...

1. (10pts) The speed v of an object is given by the equation v = At3...

1. (10pts) The speed v of an object is given by the equation v = At3 - Bect where t refers to time. (a) What are the dimensions of A, B, and C? (6) What are the SI units for the constants A, B and C? 2. (7pts) What units and value do the following combination of the two fundamental constants of nature (that is €o = 8.85 x 10-12 m-3 kg-1st AP and Mo = 1.26 x 10-6 m...
Problem 1 An object of mass m1 travels through empty space at a constant speed until...

Problem 1 An object of mass m1 travels through empty space at a constant speed until it strikes and sticks to a second object. As observed from the frame where the second object is motionless, the first object was traveling at a speed of vi. In that same frame, both objects travel at a speed of v after the collision. a. What is the general expression for the mass of the second object in terms of mi, vi, and v?...
One particle of mass m1 = 1.00 kg with an initial velocity of 5.40 m/s i...

One particle of mass m1 = 1.00 kg with an initial velocity of 5.40 m/s i collides with a second particle of mass m2 = 2.00 kg that is initially at rest. After the collision mı goes off with a final speed of 4.20 m/s in a direction 32.0° above i. V 5.4 ms (a) Find the final velocity (in terms of magnitude AND direction) of m2. agnitude AND direction) of m. Vi = 4.2 m/s (HINT: Find the direction...

An object of mass 2.99 kg, moving with an initial velocity of 5.03 î m/s, collides...

An object of mass 2.99 kg, moving with an initial velocity of 5.03 î m/s, collides with and sticks to an object of mass 2.37 kg with an initial velocity of -3.22 ġ m/s. Find the final velocity of the composite object. 9) m/s
An object of mass 2.91 kg, moving with an initial velocity of 4.99 î m/s, collides...

An object of mass 2.91 kg, moving with an initial velocity of 4.99 î m/s, collides with and sticks to an object of mass 2.36 kg with an initial velocity of -3.19 ĵ m/s. Find the final velocity of the composite object.
(1 point) An object of mass 5 kg is given an upward initial velocity of 16...

(1 point) An object of mass 5 kg is given an upward initial velocity of 16 m/sec and then allowed to fall under the influence of gravity. Assume that the force in newtons due to air resistance is -50, where v is the velocity of the object in m/sec. Assume gravitational constant is g = 9.8m/seca. Set up the differential equation for this scenario: v' = m/sec Solve the differential equation for the equation of motion: The equation is both...

Question 3 (30 pts) The ball B has a mass of 10 kg and is attached...

Question 3 (30 pts) The ball B has a mass of 10 kg and is attached to the end of a rod whose mass may be neglected. The rod is subjected to a force F = 10t2, where t is in seconds and F is in Newtons. If the ball has an initial velocity of v= 5 m/s when t=0 determine; a) the time required for the ball to reach a velocity of v= 15 m/s, b) the tension on...