a)An object of mass ?m rests on a horizontal frictionless surface. A constant horizontal force of...

a)An object of mass ?m rests on a horizontal frictionless surface. A constant horizontal force of magnitude ?F is applied to the object. This force produces an acceleration:

always
only if ?F is larger than the weight of the object
only while the object suddenly changes from rest to motion
only if ?F is increasing

choice A

b)Now let there be friction between the surface and the object. If the object has a mass of 10 kg, and ??μs = 0.4, and ??=0.3μk=0.3, how much force would be required to cause the object to move?

c)If this force is then applied continuously, how far will the object be displaced after 4.8 seconds?

d)How fast will it be going after pulling with the same force above for 4.8 seconds?

Expert Solution

genius_generous answered 6 months ago

A textbook of mass 2.00kg rests on a frictionless, horizontal surface. A cord attached to the...

A textbook of mass 2.00kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.100m , to a hanging book with mass 2.98kg . The system is released from rest, and the books are observed to move a distance 1.15m over a time interval of 0.850s

A block with a mass of m = 33 kg rests on a frictionless surface and...

A block with a mass of m = 33 kg rests on a frictionless surface and is subject to two forces acting on it. The first force is directed in the negative x-direction with a magnitude of F1 = 11.5 N. The second has a magnitude of F2 = 23 N and acts on the body at an angle θ = 22° measured from horizontal, as shown. write an expression for the component of net force, Fnet,x, in the x...

A textbook of mass 2.06 kg rests on a frictionless, horizontal surface. A cord attached to...

A textbook of mass 2.06 kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.100 m , to a hanging book with mass 2.99 kg . The system is released from rest, and the books are observed to move a distance 1.24 m over a time interval of 0.750 s. a) What is the tension in the part of the cord attached to the textbook? b) What is the...

A block of mass m1=6.6 kg rests on a frictionless horizontal surface. A second block of...

A block of mass m1=6.6 kg rests on a frictionless horizontal surface. A second block of mass m2=9.4 kg hangs from an ideal cord of negligible mass, which runs over an ideal pulley and then is connected to the side of the first block. The blocks are released from rest. How far will block 1 move during the 1.1 second interval?

A wedge of mass M rests on a rough horizontal surface with coeﬃcient of friction µ....

A wedge of mass M rests on a rough horizontal surface with coeﬃcient of friction µ. The face of the wedge is a smooth plane inclined at an angle θ to the horizontal. A mass A hangs from a light string which passes over a smooth peg at the upper end of the wedge and attaches to a mass B which slides without friction on the face of the wedge. (i) Find the accelerations for the masses A and B,...

If an object on a horizontal frictionless surface is attached to a spring, displaced, and then...

If an object on a horizontal frictionless surface is attached to a spring, displaced, and then released, it oscillates. Suppose it is displaced 0.125 m from its equilibrium position and released with zero initial speed. After 0.860 s, its displacement is found to be 0.125 m on the opposite side and it has passed the equilibrium position once during this interval.Find the amplitude of the motion.=________________mFind the period of the motion.=________________sFind the frequency of the motion.=_________________Hz

An object of mass m with a certian initial speed on a horizontal surface comes to...

An object of mass m with a certian initial speed on a horizontal surface comes to rest after traveling a distance of 15m. If the coefficient of friction is .25, what is the initial speed of the object? Use g= 10m/s^2

A 2.00 kg textbook rests on a frictionless, horizontal surface. A cord attached to the book...

A 2.00 kg textbook rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.130 m, to a hanging book with mass 3.20 kg. The system is released from rest, and the books are observed to move 1.20 m in 0.850 s. Part A.) What is the tension in the part of the cord attached to the textbook? Part B.) What is the tension in the part of the cord attached...

A 2.20-kg object is attached to a spring and placed on frictionless, horizontal surface. A horizontal...

A 2.20-kg object is attached to a spring and placed on frictionless, horizontal surface. A horizontal force of 18.0 N is required to hold the object at rest when it is pulled 0.200 m from its equilibrium position (the origin of the x axis). The object is now released from rest from this stretched position, and it subsequently undergoes simple harmonic oscillations. (a) Find the force constant of the spring. N/m (b) Find the frequency of the oscillations. Hz (c)...

. On a horizontal, frictionless surface, a 9.00 kg object initially moving east at 4.00 m/s...

. On a horizontal, frictionless surface, a 9.00 kg object initially moving east at 4.00 m/s collides with a 3.00 kg object that was initially moving north at 10.0 m/s. After the collision, the three-kilogram object moves with a velocity o 12.00 m/s directed 32.0o north of east. (a) Calculate the velocity of the nine-kilogram object after the collision, and (b) determine by calculation the type of collision that occurred.

Question