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A 5 kg block sits on top of a 10 kg block which rests on a horizontal frictionless surface. The surface between the top and bottom blocks is roughened so that there is no slipping between the two blocks. A 30-N force is applied to the bottom block. What is the force of static friction between the top and bottom block? What is the minimum coefficient of static friction necessary to keep the top block from slipping on the bottom block?
A 3.0-kg block sits on top of a 5.0-kg block which is on a horizontal surface. If the force is 10% greater than your answer for (a), what is the acceleration of each block
A 2500 kg car rounds a flat curve of radius 75 m at speed of 80 km/h. if the pavement is icy and the force of static friction is 6000 n, what is the maximum speed the car could safely go around the curve
A ship's anchor weighs 5000 N. Its cable passes over a roller of negligible mass and is wound around a hollow cylindrical drum of mass 380kg and radius 1.10m. The drum is mounted on a frictionless axle. The anchor is released and drops 16 m to water.
What is the apparent weight of a cube of iron of volume 0.2 m3 when it is submerged in water? The density of iron is 7800 kg/m3
Suppose the second distance d were traveled in the opposite direction; you forgot something and had to return home at the same constant speed as found in part (a). What is the average velocity for this trip.
A long, straight wire has a 13.7 A current flowing in the positive x-direction. Close to wire is a square loop of copper wire that carries a 2.17 A current in direction shown. The near side of the loop is d = 46.3 cm away from the wire.
At t = 5.0 seconds, the cheetah is standing still, having knocked over the gazelle. Illustrate what is the average acceleration of the cheetah from t = 0 to t = 5.0 seconds?
The distance from the Sun to Jupiter is 5.2 times longer than the Earth-Sun distance. Take the intensity of sunlight at the Earth to be 1383 W/m2. Find the intensity of sunlight at Jupiter
What is the size of the smallest vertical plane mirror in which a 10 tall giraffe standing erect can see her full-length image? (Hint: Locate the image by drawing a number of rays from giraffe's body that reflect off the mirror and go to her eye.
Two lenses, one converging with focal length 20.5cm and one diverging with focal length ?10.5cm , are placed 25.0?cm apart. Determine the magnification of the final image formed
A 370-kg sailboat has an acceleration of 0.87 m/s2 at an angle of 64° north of east. Find the magnitude and direction of the net force that acts on the sailboat.
A 0.873-kg block is held up against a ceiling by a pole that makes an angle of 21 degree with respect to the vertical; What minimum force in the pole is necessary to get the block moving
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