A 5 kg block was released on an inclined surface as shown below. The block slides at distance of 2m. The surface has coefficient of friction equal to 0.3. What is the network done on the block ?
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- The system is used to lift a block with mass 300 kg. If the friction coefficient between twoblocks, and between a block and a surface, are 0.20 and 0.35, respectively, what is the minimum force Prequired such that the object is about to be lifted? Assume weights of the blocks to be negligiblecompared to lifted weight. (g=9.81)A 1-in diameter cylinder 10 in long falls at 0.6 ft/s inside a tube of slightly larger diameter. A castor-oil film (? = 6 ? 10−3 ??−?/??2 ) of constant thickness is between the cylinder and the tube. Determine the clearance between the cylinders in the tube in inches. (S.G for steel = 7.85)A great pianist is getting ready for his concert and plan to move his exclusive grand piano to his concert venue. The 700 kg piano needs to be loaded onto a truck bed which is about 1.5 m high.1.Initially, the movers decide to use an adjustable ramp to move the piano. The ramp can only be adjusted up to 10 m long and the inclination angle must not exceed 20° to ensure a safe loading process. Determine the range of a suitable length and angle of the ramp. 2.On a second thought, the movers are considering whether it is easier to lift the piano straight up onto the truck bed or push it up along the rough the ramp. With the aid of an appropriate free body diagram, justify the most efficient option for the movers to load the piano to the truck bed with constant speed. State clearly all the assumptions made, and the principles used in the calculations to support your answers.
- A 25kg crate resting on a horizontal surface is pushed as shown. If a force of 99N is required to move the crate, the coefficient of static friction (u) between the crate and the floor is O a. 0.4041 O b. 2475.00 Dc. 24255.00 d. 3.96 :ir ENG 40) A ^A T/TE DELLDetermine the value of the angle α for any impact of a particle on a solid surface, where the entrance angle ѳ is equal to 60 ° and the coefficient of restitution is 0.5 Is it possible that angle α is less than angle ѳ? Why? Please add the free body diagram.Janice is grilling a steak for her July 4th barbecue dinner. The steak initially weighs 300 grams and is 25 mm thick. After grilling it for a while, she considers the steak done, and measures it again: it now weighs 215 grams, and is 15 mm thick. For both the cooked and uncooked steak, she uses the thumb-test to determine the done-ness, i.e. she uses her thumb (area ~5cm2) to push down with a force of 5 N. The uncooked steak compresses by 7 mm, and the cooked steak by 2 mm. Calculating elasticity What is the elasticity of the raw steak? Express your answer in Pascals but without including the units in your answer. What is the elasticity of the cooked steak? Express your answer in Pascals, but without including the units.
- Question 6: A mass of 0.2kg is attached to a spring with a spring constant of 5N/m. What should be the maximum value of the friction coefficient (b) for underdamping motionA solid block slides at an incline of 15 with a surface coating of oil of 3 millimeters thick. With a surface contact of 0.3m², draw the FBD and determine the velocity of the rigid body neglecting air resistance. Oil Temp 35°C (SAE12) Viscosity Rating 0.0814 Pa-sec Mblock 18 kg.A 50 kg box is pushed up an inclined plane at a constant speed. The coefficient of friction between the box and the plane is 0.4. Determine the efficiency of the plane which is 6 meters long and angled at 40owith the horizontal.
- A man is walking over a dome of 10m radius. How far he can descend from the top of the dome without slipping? Take coefficient of friction between the surface of the dome and shoes of the man as 0.6.What work is done on a level track in bringing the velocity of a train weighing 200 tons from zero to 30 mi/hr, if the frictional resistance at any velocity is 12 lb/ton, and if the change in speed is accomplished in a length 5280 ft? If the track were a 1% upgrade, what would be the additional work to be done?A shaft 180 mm diameter is supported in two bearings 2.5 metres apart. It carries three discs ofmass 250 kg, 500 kg and 200 kg at 0.6 m, 1.5 m and 2 m from the left hand. Assuming the mass ofthe shaft 190 kg/m, determine the critical speed of the shaft. Young’s modulus for the material ofthe shaft is 211 GN/m2.