constant angle of 25° with the vertical. Find (a) the magnitude of that push and (b) the tension in the cord. (a) Number i (b) Number Tel Units Units
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- A 4.00 kg block rests on a 30 degree incline. If the coefficient of the static friction between the block and the incline is 0.700, what magnitude of horizontal force F must act on the block to start it moving up the incline?In Fig, a slab of mass m1 =40 kg rests on a frictionless floor, and a block of mass m2 =10kg rests on top of the slab. Between block and slab, the coefficient of static friction is 0.60, and the coefficient of kinetic friction is 0.40. A horizontal force of magnitude 100 N begins to pull directly on the block, as shown. In unit-vector notation, what are the resulting accelerations of (a) the block and (b) the slab?A 19 kg box is being pushed uniformly across a horizontal surface with which the coefficient of kinetic friction between the box and the floor is 0.266. With what force does a person need to push the box in order for the box to move with no acceleration?
- A block (mass = 200.00 g) is placed on an inclined plane 45 degrees from the horizontal. The coefficient of static and kinetic friction between the block and the plane are 0.54 and 0.35, respectively. What is the frictional force between the block and the plane?A worker pulls a 15-kg crate in a straight line on a level surface by imparting a horizontal tension of 80 N to the free end of a cable whose other end is attached to the crate. If the coefficient of static friction is 0.40, what is the acceleration of the crate?A student, crazed by final exams, uses a force of magnitude 80 N and angle u =70 to push a 5.0 kg block across the ceiling of his room ). If the coefficient of kinetic friction between the block and the ceiling is 0.40, what is the magnitude of the block’s acceleration?
- Three cables are used to tie the balloon shown in Figure. Determine the magnitude of the vertical force (P) exerted by the balloon at A, knowing that the tension in cable AD is 1.041 N y1 = 4.3 m y2 = 2 m x1 = 4.3 m x2 = 3.3 m z = 5.6 m .In the figure, a slab of mass m1 = 40 kg rests on a frictionless floor, and a block of mass m2 = 10 kg rests on top of the slab. Between block and slab, the coefficient of static friction is 0.60, and the coefficient of kinetic friction is 0.40. A horizontal force F→ of magnitude 104 N begins to pull directly on the block, as shown. In unit-vector notation, what are the resulting accelerations of (a) the block and (b) the slab?A picture frame hung against a wall is suspended by two wires attached to its upper corners. If the two wires make the same angle with the vertical, what must this angle be if the tension in each wire is equal to 0.75 of the weight of the frame?
- A painting with a mass of 20 kg is suspended by two wires from a ceiling. If the wires make angles of 30° and 45° with the ceiling, find the tension in each wire.A drag force is represented by vector a of magnitude 5.72 N and direction 112.5 degrees (measured from the +x-axis, counter-clockwise). If the gravitational force of a projectile is represented by vector bof magnitude of 11.3 N. The y-component of the Sum vector, sy (N) is:A block of mass 4.20 kg is pushed up against a wall by a force P that makes an angle of θ = 50.0°angle with the horizontal as shown below. The coefficient of static friction between the block and the wall is 0.270.