11 SA to A Start from rest MA = 10Kg MB = 20kg SB G F=2t D B Smob th Surface Determine velocities of A and B after 3 Seconds A
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Determine Velocities of A and B after 3 seconds.
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- A crate has a mass of 120kg and the coefficient of static and kinetic frictionis 0.60 and 0.50, respectively. The crate starts from rest and the motor exerts a tensionT= 1220 + 200t (N). If the elevation of the dock is 30 degrees from the horizontal,A. What is the velocity of the crate after 1sec? B. Compute the power transmitted after 1sec. Topic: Impulse and momentumSituation 02. A crate has a mass of 120kg and the coefficient of static and kinetic frictionis 0.60 and 0.50, respectively. The crate starts from rest and the motor exerts a tensionT= 1220 + 200t (N). If the elevation of the dock is 30 degrees from the horizontal,a. What is the velocity of the crate after 1sec?b. Compute the power transmitted after 1sec.6. A 10-ton load is to be lifted through a height of 60 ft within 40 seconds. Determine the minimum horsepower rating of the motor.
- The engine of an airplane drives a propeller with 2.25 m in length and a mass of 90 kg. If the engine delivers a torque of 100 N⋅m, determine the time it takes the propeller to reach 300 rev/min on start-up.mass = 20 kg At the end of 20 complete cycles, t = 3 s, amplitude = 0.5 cmA crate has a mass of 120kg and the coefficient of static and kinetic friction is 0.60 and 0.50, respectively. The crate starts from rest and the motor exerts a tension T= 1220 + 200t (N). If the elevation of the dock is 30 degrees from the horizontal, What is the velocity of the crate after 1sec? Compute the power transmitted after 1sec. Provide FBD. Thank you.
- Air is exhausted from the fixed jet engine at 20 kg/skg/s with a velocity of 420 m/sm/s while it is being tested with an attached brake deflector. Determine the magnitude of the force in each of the two supporting links needed to hold the deflector in the position shown in (Figure 1). Express your answer to three significant figures and include the appropriate units.consider the mass and pulley system in the attached file. mass m1 = 29 kg and mass m2 = 12kg. the angle of the inclined plane is given and the coefficient of kinetic friction between mass m2 and the inclined plane is uk = 0.12. assume the pulleys are massless and frictionless if the system is released from rest, what is the speed of mass m2 after 2.5 s? v(2.5 s) = ?A constant torque electric motor is used to drive the punching press. The pressis provided with a flywheel that rotates at maximum speed of 125 r.p.m. Theradius of gyration of the flywheel is 0.6 m. The press punches 200 holes perhour, each punching operation takes 1.5 second and requires 16 kNm ofenergy. Calculate the power of the motor and the minimum mass of theflywheel, if its speed is not to fall below 100 r. p. m
- 1. A wheel tractor has a 200 HP engine. Calculate the available rimpull of this tractorif it is operating at an altitude of 1,000 m. above sea level, at an averagetemperature of 25oC, and at an average speed of 12 km/hr. Take rimpull efficiencyas 85%.2. The weight of the wheel tractor in Problem 1 is 30 tons and the weight on the drivingwheels is 50% of this weight. What is the maximum available rimpull if thecoefficient of traction is 0.25?3. What is the maximum grade that the tractor in Problems 1 and 2 can climb if it ismoving on a surface with a rolling resistance of 150 kg/ton?4. Assume that the tractor in Problems 1, 2, and 3 is moving down a 8% grade. Howmany minutes are necessary to accelerate to the average speed of 5 km/hr in firstgear? Use a rimpull reduction factor of 75% in your calculations.The engine of an airplane drives a propeller with 2.25 m in length and a mass of 90 kg. If the engine delivers a torque of 100 N⋅m, determine the time it takes the propeller to reach 300 rev/min on start-up. Draw.The 10 g bullet is fired horizontally at 1200 m/s into the 140 g block resting on a smoothsurface. If the bullet becomes embedded in the block, what is the velocity of the blockimmediately after impact? A) 1125 m/s B) 80 m/sC) 1200 m/s D) 75 m/s Please show all steps in solution