As a 2.0-kg object moves from ~r1 = −7ˆi + 2ˆj m to ~r2 = 8ˆi...
As a 2.0-kg object moves from ~r1 = −7ˆi + 2ˆj m to ~r2 = 8ˆi + 4ˆj m, the constant resultant force acting on it is equal to F~ = 2ˆi − 3ˆj N. If the speed of the the object at the initial position is 4.0 m/s, what is its kinetic energy at its final position?
Homework Answers
As a 2.0-kg object moves from (11i-5j)m to (7i-8j)m, the constant resultant force acting on it...
As a 2.0-kg object moves from (11i-5j)m to (7i-8j)m, the constant resultant force acting on it is equal to (4i-3j)N. If the speed of the object at the initial position is 4.0 m/s, what is its kinetic energy at its final position?
A force of 30 N accelerates a 2.0 kg object from rest for a distance of...
A force of 30 N accelerates a 2.0 kg object from rest for a distance of 3.0 m along a level, frictionless surface; the force then changes to 15 N and acts for an additional 2.0 m. (a) What is the final kinetic energy of the object? (b) How fast is it moving?
An object of mass 0.9 kg has a speed of 4.2 m/s at position 1 and...
An object of mass 0.9 kg has a speed of 4.2 m/s at position 1 and a kinetic energy of 14.2 J at position 2. Calculate its kinetic energy at position 1, its speed at position 2, and the total work done on the object as it moves from position 1 to position 2. (a) its kinetic energy at position 1 _________J (b) its speed at position 2 __________m/s (c) the total work done on the object as it moves...
A 2.0-kg block slides down a frictionless incline from point A to point B. A force...
A 2.0-kg block slides down a frictionless incline from point A to point B. A force (magnit on the block between A and B, as shown. Points A and B are 2.0 m apart.If the kinetic A is 10 J, what is the kinetic energy of the block at B? O N e blo A. a. 27 J b. 20 J c. 24 J e. 37 J ower end supported by a horizontal surface. 13. A spring (k-600 N/m) is...
An object of mass m = 1.70 kg is travelling on a horizontal surface. The coefficient...
An object of mass m = 1.70 kg is travelling on a horizontal surface. The coefficient of kinetic friction between the object and the surface is muk = 0.200. The object has speed v = 1 .35 m/s when it reaches x = 0 and encounters a spring. The object compresses the spring a distance d/2, stops instantaneously, and then travels back to x = 0 where it stops completely. Eventually you will be asked to find the spring constant,...
Given the two position vectors r1 = (-2.,0, 8.0, -2.0) and r2 = (4.0, -2.0, 2.0),...
Given the two position vectors r1 = (-2.,0, 8.0, -2.0) and r2 = (4.0, -2.0, 2.0), in meters, find (a) their resultant and (b) the angle the resultant makes with the x-axis.
QUESTION F (N) Aforce acting on a 2.0 kg object varies as shown in the figure....
QUESTION F (N) Aforce acting on a 2.0 kg object varies as shown in the figure. The velocity of the 3 4x(m x (m) -8 object at x 0 is 6.0 m/s. What is the velocity of the object at the position x 4m 5.6 m/s 4.0 m/s 4.6 m/s 6.3 m/s
A 1.2 kg object on a vertical spring with k+ 500 N/m is compressed from its...
A 1.2 kg object on a vertical spring with k+ 500 N/m is compressed from its equilibrium position. Once it is released, the mass is seen to have a velocity of 1.4 m/s at a position of 0.1 m from the equilibrium. a.) Determine the equation for this oscillation. b.) What is the maximum speed? c.) What is the maximum acceleration? d.) At what position from the equilibrium does the potential energy equal the kinetic energy?
04 Torce - (2.001 + 9.00J + J.JUK) N acts on a 2.90 kg object that...
04 Torce - (2.001 + 9.00J + J.JUK) N acts on a 2.90 kg object that moves in time interval 2.10 s from an initial posi- tion 7= (2.70i - 2.90j + 5.50k) m to a final position 72 = (-4.10i + 3.30j + 5.40k) m. Find (a) the work done on the object by the force in that time interval, (b) the average power due to the e Pare = 2 force during that time interval, and (c) the...
DIFFERENTIAL EQUATION PROBLEM An object with a mass of 2 kg moves along the x-axis and...
DIFFERENTIAL EQUATION PROBLEM
An object with a mass of 2 kg moves along the x-axis and we will
assume that the positive direction of movement is to the right.
Only one force (in N) is present and opposes the movement. Let
be the speed of the object (in m / s) at time t. The object starts
from the origin (x = 0) with an initial speed of 75 m / s. Suppose
that the resistance force has a magnitude...
A 2.0-kg block slides down a frictionless incline from point A to point B. A force (magnit on the block between A and B, as shown. Points A and B are 2.0 m apart.If the kinetic A is 10 J, what is the kinetic energy of the block at B? O N e blo A. a. 27 J b. 20 J c. 24 J e. 37 J ower end supported by a horizontal surface. 13. A spring (k-600 N/m) is...
An object of mass m = 1.70 kg is travelling on a horizontal surface. The coefficient of kinetic friction between the object and the surface is muk = 0.200. The object has speed v = 1 .35 m/s when it reaches x = 0 and encounters a spring. The object compresses the spring a distance d/2, stops instantaneously, and then travels back to x = 0 where it stops completely. Eventually you will be asked to find the spring constant,...
QUESTION F (N) Aforce acting on a 2.0 kg object varies as shown in the figure. The velocity of the 3 4x(m x (m) -8 object at x 0 is 6.0 m/s. What is the velocity of the object at the position x 4m 5.6 m/s 4.0 m/s 4.6 m/s 6.3 m/s
04 Torce - (2.001 + 9.00J + J.JUK) N acts on a 2.90 kg object that moves in time interval 2.10 s from an initial posi- tion 7= (2.70i - 2.90j + 5.50k) m to a final position 72 = (-4.10i + 3.30j + 5.40k) m. Find (a) the work done on the object by the force in that time interval, (b) the average power due to the e Pare = 2 force during that time interval, and (c) the...
DIFFERENTIAL EQUATION PROBLEM
An object with a mass of 2 kg moves along the x-axis and we will
assume that the positive direction of movement is to the right.
Only one force (in N) is present and opposes the movement. Let
be the speed of the object (in m / s) at time t. The object starts
from the origin (x = 0) with an initial speed of 75 m / s. Suppose
that the resistance force has a magnitude...
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