n object slides up a 20° slippery incline in dynamic equilibrium due to an applied force of 10.0 N directed parallel to the incline. Fill out the following table, leaving any quantity that is not given as a variable: Force x-component y-component Applied
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An object slides up a 20° slippery incline in dynamic equilibrium due to an applied force of 10.0 N directed parallel to the incline.
Fill out the following table, leaving any quantity that is not given as a variable:
|
Force |
x-component |
y-component |
|
Applied |
||
|
Normal |
||
|
Weight |
||
|
ma |
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- The coefficient of static friction between A and C and between B and D is g = 0.25, and between A and B is g = 0.46. Neglect the weight of each wedge. (Figure 1) Figure Part A Pmin = 19 Value 15° Units Determine the smallest force P needed to lift the 3000-lb load. Express your answer to three significant figures and include the appropriate units. A ? 3000 lb B D 1 of 1A 28.0-kg block is connected to an empty 2.50-kgbucketby a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.41 and the coefficient of kinetic friction between the table and the block is 0.32. Sand is gradually added to the bucket until the system just begins to move. Ignore massof cord. (Figure 1) Calculate the mass of sand added to the bucket. Express your answer to two significant figures and include the appropriate units. Calculate the acceleration of the system. Express your answer to two significant figures and include the appropriate unitsThe figure below shows a clawhammer as it is being used to pull a nail out of a horizontal board. A force of magnitude 180 N is exerted horizontally as shown. (Assume that the force the hammer exerts on the nail is parallel to the nail and perpendicular to the position vector from the point of contact. The 2.jp x-component of this force's lever arm is 5 cm.) 30.0 cm ymedio locume Single point of contact /30.09 plogy 5.00 cm (a) Find the force exerted by the hammer claws on the nail. (Enter the magnitude.) ter 3 (b) Find the force exerted by the surface at the point of contact with the hammer head. (Assume the positive x-axis is to the right.) magnitude direction o counterclockwise from the +x-axis Need Help? Read It
- At what angle & must the 520-lb force be applied in order that the resultant R of the two forces have a magnitude of 1100 lb? For this condition what will be the angle /ß between R and the horizontal? 520 lb 770 lb Answers: i B- iThe coefficient of friction, u, can be determined in an experiment by measuring the force F required to move a mass m. When F is measured and m is known, the coefficient of friction can be calculated by: H- F/(mg) -9.81 m/s). friction Results from measuring F in six tests are given in the table below. Determine the coefficient of friction in cach test, and the average from all tests. Test Mass m (kg) Force F(N) 2 4. 3 4. 2 10 20 50 12.5 23.5 30 61 117 294A force , of magnitude 5.00 units acts on an object at the origin in a direction 8= 41.0 above the positive xaxis. (Sen the figure below.) A second force F, of magritude 5.00 units acts on the object in the direction of the positive y-axis. Find graphically the magnitude and direction of the resultant force F, + F 10 Your response is within 10% of the correct value. This may be due to roundoff error or you could have a mistake in your calculation. Carry out all intermediate results to a least four-digit accuracy to minimize roundoft error. units 31 magnitude direction Your response differs from the correct answer by more than 10%. Double check your calculations. countercocknise from the +x-ads
- Problem Set 1. Consider the Atwood machine used in the experiment. The 70-g right pan, made 10g heavier than the left pan, takes 2.8 s to descend to the bottom platform, 12dmbelow the top platform. Mass of the pulley=87.15g. What is the %error in theacceleration of the pans? 2. Two objects with masses of 3.00 kg (left) and 5.00 kg (right) are connected by a light string that passes over a frictionless pulley, a system similar to the Atwood machine. Apply your results in Post-lab activity no.1 and determine:a. the tension in the stringb. the acceleration of each objectc. the distance each object will move in the first second of motion if both objects start from restA runaway train car that has a mass of 12500 kg travels at a speed of 5.7 m/s down a track. Compute the time required, in seconds, for a force of 1300 N to bring the car to rest. DeltaT=A 247N crate resting on a plane inclined 25-degrees with the horizontal requires a 28N force to bring it down to 7.1m from its initial position. The force is applied 67-degrees with respect to the horizontal. Neglecting friction between the crate and plane, determine the time (in seconds) that the crate had travelled a distance of 7.1m. Answer in two decimal places. Numerical values only. Don't indicate units here, just on the submitted solution. You Answered 2.07 Correct Answer 1.69 margin of error +/- 0.01
- Four forces act on a particle that is in equilibrium where F3 and P are in the xz-plane. The magnitude of one force is know to be P=600 N A) Write the equilibrium equation for the forces in the x- direction. Express your answer in terms of F1,F2,F3, and P. Express know forces in N and angles in degrees B) Write the equilibrium equation for the foces in the y-direction. Express your answer in terms of F1,F2,F3, and P. Express know forces in N and angles in degrees C) Write the equation for forces in the z-direction. Express your answer in terms of F1,F2,F3, and P. Express know forces in N and angles in degreesAs shown in the figure, the mass of the block is 214 kg. If Fappi= 59.4 N and Fapp2=38.7 N, find the normal force. Fapp. Fopps FRShown is the operation of a garlic press. The lower part of the press is held steady, and the upper handle is pushed down, thereby crushing a garlic clove through a screen. Approximate distances are shown in the figure. If the user exerts a 12 N force on the upper handle, estimate the force on the clove.