The 25-kg roll of paper has a radius of gyration kA - 90 mm about an axis passing through point A. It is pin supported at both ends by two brackets AB. The roll rests against a wall for which the coefficient of kinetic friction is - 0.3. Neglect the mass of paper that is removed. (Elguce 1) • Part A Determine the magnitude of the constant vertical force F that must be applied to the roll to pull off 1 m of paper in t = 3s starting from rest Express your answer to three significant figures and include the appropriate units. Figure 1 of 1 Value Units Submit Previous Answers Resuest Answer 300 X Incorrect; Try Again; 5 attempts remaining 15 Provide Feedback Next >

The 320-lb homogeneous spool is placed on the inclined surface. Determine the vertical force P that is required to keep the spool in the position shown. Assume that there is enough friction to prevent slipping at A.

End B of the uniform 2.7-kg bar AB is connected to a small roller that moves in a horizontal slot. The other end of the bar is pinned to the homogeneous 1.8-kg disk that rolls without slipping on the vertical surface. The spring attached to A has a free length of 0.3 m and a stiffness of 58 N/m. After the system is becomes horizontal. Determine the magnitude of the force P that acts on the bar at B. 2.1 m 0.24 m 0.9 m www 1.8 kg 1.5 m 2.7 kg P

The solid homogeneous cylinder shown has a mass of 30 kg and is rotating at 1200 rpm clockwise about a fixed horizontal axis through O. The coefficient of kinetic friction between the brake and the cylinder is 0.20. If the tension in the spring when the brake is applied is 100 N, determine the time required for the cylinder to stop rotating. Neglect the thickness of the vertical members. (Draw FBD)

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L from Pivot 1. A uniform bar with mass M =3.25 kilograms is the top end of the bar. A cable connects to the bar as shown in the diagram. the 75.0 40.0° a. Calculate the tension in the cable required to keep tne bar in static equilibrium. Pivot preso your your answe stem right when n terr b. Calculate the force (both magnitude and direction) exerted by the pivot.

The 40-lb spool is suspended from the hanger GA and rests against a vertical wall. The center of gravity of the spool is at G and the weight of the hanger is negligible. The wire wound around the hub of the spool is extracted by pulling its end with the force P. If the coefficient of static friction between the spool and the wall is 0.25, determine the smallest P that will extract the wire.

The homogeneous bar AB weighs 25 lb. Determine the magnitudes of the forces acting on the bar at A and B. Neglect friction.

Determine the smallest horizontal force P that would push the homogeneous cylinder of weight W over the curb. Neglect friction.

The figure is a model for member CDE of the frame described in Prob. 4.10. Draw the FBD of the member, neglecting its weight. Count the unknowns.