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A) A 28.0-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface and the block are ?s=0.890 and ?k=0.570. A horizontal string is attached to the block and a constant tension T is maintained in the string. What is the force of friction acting on the block if T = 23.92 N?
B) What is the force of friction acting on the block if T= 28.92 N?
A Force F= (6xi+ 5yj), where F is in newtons and x and y are in meters, acts on an object as the object moves in the x direction, Find the work W = integral (F · d vector r) done by the force on the object
A worker pushes horizontally on a large crate with a force of 297 N, and the crate is moved 4.8 m. How much work was done.
You throw a ball straight down from an apartment balcony to the ground below. Find the height of the balcony
How far away is the Milky Way from our nearest neighbour, Andromeda Galaxy, if Andromeda contains roughly the similar number of stars and attracts the Milky Way with a gravitational force of 2.4 x 10^30 N.
returns the shot with the ball traveling horizontally at 40 m/s in the opposite direction. Illustrate what is the impulse delivered to the ball by the tennis racquet?
At our distance from the Sun, the intensity of solar radiation is 1370 W/m2. The temperature of the Earth is affected by the greenhouse effect of the atmosphere.
From another measurement, you have found that velocity of the jumper's center of mass has only a y component of v2=2.5 m/s as the jumper's feet leave the floor.
A total of 2.99·106 electrons are placed on an initially uncharged wire of length 2.25 m. What is the magnitude of the acceleration of a proton placed at that point in space
A bucket of mass 1.60 is whirled in a vertical circle of radius 1.45. Find the speed of the bucket
A cable is used to raise a 29kg urn from an underwater archeological site. There is a 21 N drag force from the water as the urn is raised at a constant speed.
Cars A and B are traveling around the circular race track. At the instant shown, A has a speed of 78ft/s, Determine the relative acceleration of car A with respect to car B at this instant
A car drives straight off the edge of a cliff that is 60 m high. The police at the scene of the accident observed that the point of impact is 134 m from the base of the cliff. How fast was the car traveling while it went over the cliff.
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