please answer the following multiple choice. no explanation is required.
1. A supported parallelepiped is more easily dragged if... c. 1.02 m/s^2 a. We support him for his minor face. d. 1.22 m /s^2 b. It does not influence the face in which we support it. c. We support him for his old face. 10. A 100 kg box is at rest on the table with a uk of .2 and a us of .5 (These are the coefficients of kinetic and static friction, respectively). If I push the box with a force of 40 N.; Will the 2. A block resting on an inclined plane begins to slide when... box move? If it does not move, find the force of static friction. If it moves, then find the a. the friction force is maximum. force of kinetic friction. b. the normal is maximum. a. yes 40N C . The tangent of the angle between the plane and the ground is equal to the b. No, 40N coefficient of friction. C. Yes 49N 3. . The force of friction can... d. No, 49N a. be less than the product of the coefficient of friction times the normal. b. and must always be equal to the product of the coefficient of friction by the normal. 11. A 200 kg wagon is pushed along a road with a uk of .1 and a us of .3 (These are the c. be greater than the product of the coefficient of friction times the normal. coefficients of kinetic and static friction, respectively). If the wagon is pushed with a force 4. The normal force can... (you can choose more than one) of 800 N, will it move? If so, find the acceleration of the wagon! a. be greater than the force of the weight. a. Nope b. be less than the force of the weight. b. Yes 10m/s^2 c. have negative values. C . Yes , 3 m / s^2 d. be equal to zero. d. Yes, 1 m/s^2 5. Is there an optimal drag angle for pulling a box resting on the ground? 12. Consider a block of mass 9.81 kg on an inclined surface with a coefficient of friction of a. It depends on the coefficient of friction. 0.15 and an angle of inclination of 30 degrees. What will be its acceleration on the incline b. Yes, the smaller the angle and the force is almost parallel to the ground. if the acceleration due to gravity is 9.81 m/s^2? c. yes, 459 a. 4.63m/s^2 6. What type is the movement of a body supported on a plane at the moment when, by b. 9.81m/s^2 slowly raising the plane, it begins to slide and just at that moment we stop raising the c. 3.63m/S^2 plane? d. 10 m/s^2 a. Uniformly accelerated and rectilinear motion b. uniform and rectilinear movement c. Slow movement to stop. 7. Reasoning on the matter of friction, if the net force acting on an object in the x-direction is zero, what can we say about its acceleration? a. not enough information provided b. is zero C. is negative d. is positive A hockey puck slides on ice with constant velocity. What is the net force acting on the puck? a. Depends on disk speed b. Less than its weight but greater than zero c. equal to your weight d. Zero A 220-kg box is pushed horizontally with a force of 700 N. If the coefficient of kinetic friction is 0.20, find the acceleration of the box. a. 1.42 m/s^2 b. 1.62 m/s^2
