35mm 干货 B G 電話:20mm Mum001 是 5.46 45mm、

Use the figure to answer the question Two blocks are positioned on surfaces, each inclined at the same angle of 57.5 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of the black block is 5.50 kg, and this time there is NO friction. What is must be the mass of the white block if both blocks are to slide to the LEFT at an acceleration of 1.5 m/s^2?   a. 7.94 kg   b. 4.00 kg   c. 11.91 kg   d. 5.29 kg

A 1500-kg barge is being towed by means of two horizontal cables. One cable is pulling with a force of 90.0 N in a direction 25.0° west of north. Assume that the water exerts no appreciable frictional drag on the barge. Determine the following, showing all your steps clearly: a. In what direction should the second cable pull so that the barge will accelerate northward, if the force exerted by the cable is 130 N? Give your answer as an angle relative to north and state which direction (east of north or west of north). b. What is the acceleration that the barge moves north with? c. How far does it move in the first 15 seconds?

Use the diagram to answer the question   Two blocks are positioned on surfaces, each inclined at the same angle of 52.8 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of the black block is 4.60 kg, and the coefficient of kinetic friction for both blocks and inclines is 0.530. Assume static friction has been overcome and that everything can slide. What is must be the mass of the white block if both blocks are to slide to the LEFT at an acceleration of 1.5 m/s^2?   a. 10.02 kg   b. 2.94 kg   c. 3.10 kg   d. 18.07 kg

Y NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) A cubic container is at rest on a rough horizontal warehouse floor. If the mass of the container is 37.5 kg and the coefficient of static friction is 0.556, determine the minimum horizontal force that must be applied to the top of the container to cause tipping.

Consider the system in the picture below: a cart of mass M with a static friction coefficient u is connected through a massless string to a hanging mass m. M is a capital letter, m is lower case. Write them as such, or vour equations will be confusing, M We want to find the maximum value of the hanging mass m such that the system is in equilibrium. 1. Free body diagram (FBD): Draw a FBD for each: the Cart and the hanging mass. Clearly show all the forces. 2. Clearly write the equilibrium equations for the cart in the horizontal and vertical direction. 3. Clearly write the equilibrium equation for the hanging mass. 4. Solve the system of the three equations above for the hanging mass m. Show your calculation to get credit. 5. What would happen if mass m exceeds this value? Explain.

You must show all pertinent solutions and the illustration that supporting the answer. Please list the given and the formula that had been used. Box the answer.