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1.
a) A block with a mass m is pulled along a horizontal surface for a distance +x by a constant force F at an angle theta with respect to the horizontal. The coefficient of kinetic friction between block and table is µ. Is the force exerted by friction equal to µmg?

b) How much work is done by the friction force and by F?

c) Identify all the forces that do no work on the block.

d) Let m = 2.00 kg, x = 4.40 m, theta = 46.0°, F = 14.0 N, and µ = 0.4, and find the answers to parts (a) and (b).

2.
A 2.00 kg block situated on a rough incline is connected to a spring of negligible mass having a spring constant of 100 N/m (Fig. P5.76). The block is released from rest when the spring is unstretched, and the pulley is frictionless. The block moves 17.4 cm down the incline before coming to rest. Find the coefficient of kinetic friction between the block and incline.

A 17.2 kg box is released on a 38.1 degree incline and accelerates down the incline at 0.269 m/s^2. Find the friction force impeding its motion, and the coefficient of friction.

1.) A horizontal force of 3.00 N is applied to a 1.00-kg radio, initially at rest on a table with a level surface.
a.) Will the radio move if the coefficient of the friction is 0.45?
b.) What is the coefficient of friction if it just begins to move?
c.) What is its acceleration if the coefficient of the friction is only 0.0

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.190 and the push imparts an initial speed of 4.20 m/s?

The mean diameter of a conical friction clutch is 250mm with a width of the conical surface being 50mm. The clutch is lined with a material having a coefficient of friction of 0.25. The angle of the cone being 50o. Find the greatest power that will be transmitted at 1200rpm together with the least axial load required without sli

If the coefficient of static friction between tires and pavement is .66, then what torque must be applied to the 66-cm-diameter wheels of an automobile of mass 1450 kg to 'lay rubber', which occurs when friction is broken.

1. If there is a maximum frictional force between your shoe and the track, does that set a limit on how fast your can start (accelerate) in sprint? Does that mean you cannot have more than a certain acceleration even if your have increduly strong leg muscles? What is done to solve this problem?
2. Explain why friction is impo

A hollow, spherical shell with mass 2.00 kg rolls without slipping down a slope angled at 34.0 degrees
A) Find the acceleration (take free fall to be 9.8 m/s^2)
B) Find the friction force
C) Find the minimum coefficient of friction needed to prevent slipping

1. A 400lb body is pulled up an inclined plane 15 ft long and 5 ft high. The force to pull the body up the plan at constant speed is 200lb. Compute ideal mechanical advantage (IMA = 15/5 =3) actual mechanical advantage (AMA = P/F = (400/2.2 x 9.8)/200/2.2 x9.8) = 2). What is the coefficient of friction between the body and the p

If an object slides directly down an inclined place, at a constant velocity of 6 m/s, how large is the coefficient of kinetic friction if the plane make an angle of 25 degrees with the horizontal?

A 30.5 kg block is connected to an empty 1.00 kg bucket by a cord running over a frictionless pulley (Fig. 4-57). The coefficient of static friction between the table and the block is 0.470 and the coefficient of kinetic friction between the table and the block is 0.320. Sand is gradually added to the bucket until the system jus