3B. 100-N block on a rough 30º-incline is acted upon by a force P as shown causing it to accelerate at 2 m/s2 down the plane. The coefficient of kinetic friction is 0.30. (a) Draw the FBD of the block (b) Find the magnitude of P. 20 30
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- A 75.0-g arrow, fired at a speed of 110 m/s to the left, impacts a tree, which it penetrates to a depth of 12.5 cm before coming to a stop. Assuming the force of friction exerted by the tree is constant, what are the magnitude and direction of the friction force acting on the arrow?3B. 100-N block on a rough 30º-incline is acted upon by a force P as shown causing it to accelerate at 2 m/s down the plane. The coefficient of kinetic friction is 0.30. (a) Draw the FBD of the block (b) Find the magnitude of P. 20 30A boy takes 18.1 seconds to slide down a smooth inclined plane of angle such that tan(e) = 1.1, starting from rest. How long (in seconds) he takes to slide down an identical rough inclined plane of friction coefficient 0.72, if he starts from rest? Anwer
- A 100. N block sits on a rough horizontal floor. The coefficient of sliding friction between the block and the floor is 0.250. A horizontal force of 90.0 N acts on the block for 3.00 seconds. Calculate the velocity of the block after 3.00 seconds if it starts from rest.2. A man pushes a crate of mass 70kg along a horizontal floor with a constant horizontal force in an easterly direction. Starting from rest, the trunk. reaches a velocity of 1.5 m/s (E) after 3.0s. The coefficiant of Kinetic friction between the crate and the floor is 0.34. Determine the man's horizontal applied force. Be sure to draw a free body diagram fram and indicate positive direction.moodle.nct.eduom/mod/qi -Learning Portal Courses - Reports - e-Services- Academic Departments - ETC - CIMS - A 17kg crate resting on a horizontal surface is pushed as shown. If the coefficient of static friction u, between the surfaces is 0.24, what is the minimum force (F) required to start the motion? O a 4.08N O b. 70.83N Oc 39.98N Od. 694.17N Windows buut An object of mass Skg is sliding with a constant velocity of 10m/s on a frcitionless horizontal table. The force needed to keep the object moving with the same velocity is. 144 4- # 4. 6. V.
- 10) A push of magnitude P acts on a box of weight W as shown in the figure. The push is directed at an angle 0 below the horizontal, and the box remains a rest. The box rests on a horizontal surface that has some friction with the box. What is the friction force on the box due to the floor? P. WIn the figure, the block of mass 2.00 kg accelerates down the inclined plane. The coefficient of kinetic friction is 0.200 and angle of the inclined plane is 30.0°. What is the acceleration of the block? normal force N friction force f mg sine mg cose mg O 3.05 mis? O 5.05 m/s? O 2.05 m/s? O 4.05 m/s?A wooden crate approaches a snowy hill at velocity of 12 m/s. The coefficient static and kinetic friction between the snow and the crate are 0.41 and 0.31, respectively, and the hill slopes upward at 44 deg. above the horizontal. 1. Find the magnitude of the acceleration as it is going up the hill. 2. Find the magnitude of the acceleration of the crate after it has reached the highest point and is sliding down the hill.
- Consider the figure shown in the following figure. You are loweringtwo boxes, one on top of the other, down a ramp by pulling on a ropeparallel to the surface of the ramp. Both blocks move with constantvelocity of 10.0 [m/s]. The coefficient of kinetic friction between theramp and the lower box is 0.555 and the coefficient of static frictionbetween the two boxes is 0.750. A. Draw the Free-Body diagram of both blocks. Set the ?-axis parallel to the ramp. B. Write Newton’s 2nd law along the ? and ? directions for both blocks considering their state of motion (accelerations). C. What are the magnitude and direction of the frictional force on the upper box? D. What is the magnitude of the applied force? E. Determine the angle at which the top block will start to slide down the bottom block.Consider the figure shown in the following figure. You are loweringtwo boxes, one on top of the other, down a ramp by pulling on a ropeparallel to the surface of the ramp. Both blocks move with constantvelocity of 10.0 [m/s]. The coefficient of kinetic friction between theramp and the lower box is 0.555 and the coefficient of static frictionbetween the two boxes is 0.750. A. Draw the Free-Body diagram of both blocks. Set the ?-axis parallel to the ramp. B. Write Newton’s 2nd law along the ? and ? directions for both blocks considering their state ofmotion (accelerations). C. What are the magnitude and direction of the frictional force on the upper box? D. What is the magnitude of the applied force? E. Determine the angle at which the top block will start to slide down the bottom block.b) A girl exerts a 36-N horizontal force as she pulls a 52-N sled across a cement sidewalk at constant speed. What is the coefficient of kinetic friction between the sidewalk and the metal sled runners? Ignore air resistance. Hint: Fk whe 9 M