An 80.0 kg object moving in the + direction has a uk=0.35 and a us=0.60. What...

Question

Question

An 80.0 kg object moving in the + direction has a uk=0.35 and a us=0.60. What is the acceleration of the object?

Answer 1

Answer #1

Solution ) For an object to accelerate it should move . An object moves only if it has kinetic friction .

If object has static friction then it do not move and therefore no acceleration .

Kinetic friction force , fk = (uk)N

N is normal force , N = mg

fk = ma

Here a is acceleration

ma = (uk)mg

a = (uk)g

a = 0.35×9.8

a = 3.43 m/s^2

Answer 2

Similar Homework Help Questions

1. An object has a mass of 20.0 kg and a coefficient of friction of 0.40....

1. An object has a mass of 20.0 kg and a coefficient of friction of 0.40. Find the force of friction in this situation. 2. An object is known to have a coefficient of kinetic friction (µk) of 0.167 and a coefficient of static friction (µs) of 0.42. If the normal force is 200.0 N, how much frictional force will it encounter while it is moving? 3. An 80.0 kg object has a µk = 0.35 and a µs...
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...
3. An 4.0-kg object moving 2.1 m/s in the positive x direction has a one-dimensional collision...

3. An 4.0-kg object moving 2.1 m/s in the positive x direction has a one-dimensional collision with a 2.0-kg object moving 3.2 m/s in the opposite direction. Assuming the collision is frictionless. The final velocity of the 2.0-kg object is 2.1 m/s in the positive x direction. What is the final velocity of the 4.0 kg object? (0pts)

A 3.0-kg object moving 8.0 m/s in the positive x direction has a one-dimensional elastic collision...

A 3.0-kg object moving 8.0 m/s in the positive x direction has a one-dimensional elastic collision with an object (mass = M) initially at rest. After the collision, the object of unknown mass has a velocity of 6.0 m/s in the positive x direction. What is M? a. 6.0 kg b.5.0 kg c. 4.2 kg d. 7.5 kg e. 8.0 kg
For an object moving in uniform circular motion a) What is the direction of the centripetal...

For an object moving in uniform circular motion a) What is the direction of the centripetal force (Fc) b) What is the direction of its acceleration? c) What is the direction of its instantaneous velocity?
An object (A) of mass mAA = 27.5 kg is moving in a direction that makes...

An object (A) of mass mAA = 27.5 kg is moving in a direction that makes angle of 56° south of east with a speed vAA = 5.00 m/s, while object (B) of mass mBB = 17.5 kg is moving due north with a speed vBB = 8.00 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.

Object A has a mass of 50 kg and is initially moving along the x-axis at...

Object A has a mass of 50 kg and is initially moving along the x-axis at 5.0 m/s. It collides with object B, which has a mass of 22 kg initially at rest. After the collision, object A moves with a velocity of 3.0 m/s in a direction that is 30 degrees above the x-axis. What is the final velocity (magnitude and direction) of object B?
A 3.24 kg object initially moving in the positive x-direction with a velocity of +5.15 m/s...

A 3.24 kg object initially moving in the positive x-direction with a velocity of +5.15 m/s collides with and sticks to a 1.66 kg object initially moving in the negative y-direction with a velocity of -2.54 m/s. Find the final components of velocity of the composite object. (Indicate the direction with the sign of your answer.) Vfx = ? Vfy = ?
An 4.7-kg object moving at 12.2 m/s catches up and collides with an 22.3-kg object moving...

An 4.7-kg object moving at 12.2 m/s catches up and collides with an 22.3-kg object moving at 2.1 m/s in the same direction. After the collision the 4.7-kg object is observed to be moving in the opposite direction with the speed of 2.6 m/s. How much kinetic energy was lost in this system?

A force is applied to a 3.5 kg object moving in the x-direction with the following...

A force is applied to a 3.5 kg object moving in the x-direction with the following profile over time: a. What value of F_max gives an impulse of 6.0 N s? b. If the object had an initial speed of 4.2 m/s, what was the change in kinetic energy after the force was applied?