4. An engine that worked for 46 s consumed E = 23,500 J and lifted a in 75 kg body from the ground to a height of 21 m above the ground.
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A: 3) Consider the FBD below,
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- A cheetah can accelerate from rest to 7.4 m/s (about 18 m/h) in 1.8 seconds. How much average power does the cheetah generate during the acceleration phase of its motion if its mass is 51 kg? a) 1400 W. b) 1600 W. c) 1800 W. d) 2500 W. e) 2800 W|6. A mass m = 3 kg is dropped from a height of h = 10m onto the top of an incline as drawn below. The coefficient of friction between the mass and the inclined and horizontal surfaces is 0.5. Use energy principles to find the distance L from the bottom of the incline that the mass will travel before it comes to rest. με 0.5 L 5m H=0.5 3m 4m h=10mA 41-kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 1.5 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar. m
- A car with mass of 1138 kg accelerates from 0 m/s to 40.0 m/s in 10.0 s. Ingnore air resistance. The engine has a 22.0% efficiency, which means that 22.0% if the energy released by the burning gasoline is converted into mechanical energy. What is the average mecanical power output of the engine? What volume of gasoline is consumed? Assume that the burning of 1.00 L of gasoline released 46.0 MJ of energy.3. A student drags a 3 kg box 5 m across a rough floor with a force of 40 N. A frictional force of 10 N resists the motion of the box. A) Calculate the work done by the student. B) Calculate the work done by friction. C) Determine the net work done on the box. D) If the box started from rest, how fast is it going at it approaches 5 m? has a yelocity of 8#19 AP Physics 1 question attached.
- Q3. An aircraft having a take-off mass of 36500 kg and a wing area of 95 m² fitted with turboprop engines of total power 10000 kW, assumed not to vary with speed, and propellers of 87 per cent efficiency. The drag polar for the aircraft is: C₂-0.0145+0.052C₂² At sea level: (a) Calculate the coefficient of lift at minimum required power, associated speed and the minimum power required for steady level flight. (b) Calculate the maximum rate of climb and angle of climb available to the pilot.Fill in the blank. You serve a volleyball with a mass of 2.1kg. The ball leaves your hand at 30m/s. The ball has _______ energy. Calculate it.Suppose you were able to convert the energy used by light bulbs into kinetic mechanical energy that move objects. If you burnt a 60.0 W for 2.500 hours, how far could an object be pulled if a force of 5.0x103 N is supplied?