A 6.50 x 102 - kg elevator starts from rest and moves upwardfor 3.00 s with constant acceleration until it reaches its cruisingspeed, 1.75 m/s. (a) What is the average power of the elevator motor during this period? (b) How does this amountof power compare with its power during an upward trip withconstant speed?

Q: The loaded cab of an elevator has a mass of 4.70 × 103 kg and moves 191. m up the shaft in 24.0 s at…

A: Calculate the constant speed at which the elevator is moving. v=Dt=191 m24 s=7.958 m/s Here, v is…

Q: An accelerating object of mass m=20 kg is fired with an initial speed v;=3 m/s at a starting point.…

A: Given: mass of an object, m = 20 kginitial speed, vi = 3 m/sfinal kinetic energy, KEf = 122 J

Q: The loaded cab of an elevator has a mass of 3.0* 103 kg and moves 210 m up the shaft in 23 s at…

A: Given:  mass, m = 3 x 1000 = 3000 kg  distance, s = 210 m  time, t = 23 s

Q: The loaded cab of an elevator has a mass of 1.80 x 10³ kg and moves 225. m up the shaft in 23.0 s at…

A:

Q: A truck with a loaded mass of 12 tons is moving on a 4% graded highway section with a velocity of 30…

A: Slope =4100=125 = tanθ velocity =30km/h = 8.33 m/s F-mg sinθ -friction -air resistance=0 Power =…

Q: A certain automobile having mass 1000 kg climbs an inclined road with a constant 32 m/s speed. If…

A: Mass of the car is m = 1000 kg velocity of the car is is v = 32 m/s Angle of inclination of the road…

Q: A world-class sprinter running a 100 m dash was clocked at 5.4 m/s 1.0 s after starting running and…

A:

Q: A 450 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m (about a quarter of a…

A: mass of dragster = 450 kg Initial velocity = 0 m/s final velocity = 120 m/s distance moved = 400 m…

Q: A block with a mass of 12.5kg is pulled up a smooth incline that makes an angle of 15.0° with…

A: Given data:   Mass of block (m) = 12.5 kg Inclined angle (θ) = 15.0° Power output (P) = 35 W…

Q: The loaded cab of an elevator has a mass of 4.70 x 10° kg and moves 233. m up the shaft in 21.0 s at…

A: Given Information:- Mass of the loaded cab of the elevator is m=4.70×103 kg Distance h=233 m Time…

Q: The loaded cab of an elevator has a mass of 3.0 × 10³ kg and moves 210 m up the shaft in 23 s at…

A:

Q: A 40.0 kg jogger runs up the slope described in the fiqure. She maintains a constant speed of 4.00…

A: Given  Mass of jogger(m) = 40Kg Speed (s) = 4m/s

Q: certain 1200kg car can accelerate from rest to a speed of 25m/s ina time of 8.00s. What average…

A:

Q: A 135g Frisbee is thrown from a point 1.05 m above the ground with a speed of 12.00 m/s. When it has…

A: Given m=135g H1=1.05m H2=2.50m V1=12.00m/s V2=10.4831m/s   Work done on the Frisbee can be defined…

Q: A truck of mass 900 kg starts with an initial velocity of 2.00 m/s and travels in a straight line…

A: Mass of the truck,

Q: A loaded elevator has a total mass of 28 kg and is lighted to a height of 200 m in a time of 45s.…

A:

Q: An accelerating object of mass m=5 kg is fired with an initial speed v;=9 m/s at a starting point.…

A:

Q: Calculate the power output needed for a 952-kg car to climb a 2.00° slope at a constant 33 m/s while…

A:

Q: Water flows over a section of Niagara Falls at a rate of 1.4 × 106 kg/s and falls 60 m. What is the…

A: Given: The rate of mass of the water=dmdt=1.4×106 kg/s. The height of the fall=h=60 m Acceleration…

Q: A car of mass 920.0 kg accelerates away from an intersection on a horizontal road. When the car…

A: mass of car (m) = 920 kg speed (v) = 12.4 msNet power (P) = 5300 W

Q: A 13.8 kg crate is pulled up a rough inclinewith an initial speed of 1.5 m/s. The pullingforce is…

A: Let the mass of the crate be denoted by m, the pulling force as F, the force of friction as f , v…

Q: Suppose a 925-kg car climbs a 2.05° slope at a constant speed of 30.5 m/s.   Calculate the power…

A: Since, the car climbs the slope with a constant velocity, the expression for the power required is,

Q: I need help with this homework problem.

A: Given Mass of the elevator m = 3.0 x 103 kg Distance travelled y = 245 m Duration t = 19 s

Q: You drag your 30 kg suitcase 1200 m thru the Chicago airport at essentially constant velocity 2.0…

A: Given: Mass, M = 30kg Distance , s= 1200m Velocity, v = 2.0m/s Force, F = 90N, 20o westward

Q: A 1.00 x 10*3 kg elevator car carries a maximum load of 8.00 x 10*2 kg. A constant frictional force…

A:

Q: Calculate the power output needed for a 989.00 kg car to climb a 2.00° slope at a constant 45.00 m/s…

A: Given, Mass of  car m = 989 Kg Slope θ =2∘   Speed v = 45 m/s friction f = 749  N   We know the…

Q: A 1300-kg elevator carries a maximum load of 750 kg. A constant frictional force of 3000 N retards…

A:

Q: Suppose a 975-kg car can produce a useful power output of 42.5 hp (1 hp = 746 W). How long, in…

A: Data Given ,  Mass of the car ( m ) = 975 kg Power of the car ( P ) = 42.5 hp   = ( 42.5 × 746 ) W =…

Q: A fully loaded, slow-moving freight elevator has a cab with a total mass of 1200 kg, which is…

A:

Q: What minimum horsepower must a motor have to be able to drag a 380 kg box along a level floor at a…

A: The frictional force acting between box and floor is, F=μmg             (I)…

Q: A small motor runs a lift that raises a load of bricks weighing836 N to a height of 10.7 m in 23.2…

A:

Q: What average mechanical power (in W) must a 70.5 kg mountain climber generate to climb to the summit…

A: Write the given values with suitable variables. m=70.5 kgh=305 mt=47 min=47×60 s=2820 s Here, m, h,…

Q: As part of a charity fund-raising drive, a Chicago marathon runner of mass 50.0 kg runs up the…

A: Given data:  Mass of runner (m) = 50.0 kg Height of building (h) = 443 m Time (t) = 15.0 minutes…

Q: A car accelerates uniformly from rest to 20.0 m/s in 5.6 s along a level stretch of road. Ignoring…

A: Given that, The initial speed of the car, u = 0 Final speed of the car, v = 20 m/s Time, t = 5.6 s…

Q: What are the average powers a car weighting 1.2 × 10³ kg has to use (power of the car's engine) to…

A: Given: mass of the car (m) = 1200 kg v1 = 0 m/s v2 = 14 m/s v3 = 28 m/s Time in both cases (t) = 4 s

Q: What is her useful power output if she does 25 pushups in one minute?

A: It is given that,

Q: A 55 kg boy swings on a single strand of rope 9.50m long and passes the lowest point at a speed of…

A: Given, Mass of boy,m=55 kg Length of rope,L=9.5 m Elevation of lowest point,h1=0.7 m Speed at lowest…

Q: If a car (m = 1200 kg) generates 18 hp when traveling at a steady 90 km/h, what must be the combined…

A:

Q: A loaded ore car has a mass of 9.50 x 102 kg and rolls onrails with negligible friction. It starts…

A: given:Mass of car = 9.5 X 102 kgInitial velocity of the car = 0Angle = 30oTime = 12 sFinal velocity…

Q: A 0.5-kg ball is thrown with a speed of 15.6 m/s at an angle 37.7 degrees. How high does it go? To…

A: Given: Mass of the ball m = 0.5 kg. The initial velocity of the ball v = 15.6 m/s. Angle of…

Q: What minimum horsepower must a motor have to be able to drag a 450 kg box along a level floor at a…

A:

Q: Calculate the power output needed for a 952-kg car to climb a 2.00° slope at a constant 33 m/s while…

A:

Q: The loaded cab of an elevator has a mass of 2.40 × 10° kg and moves 233. m up the shaft in 17.0 s at…

A: Given mass of a cab = 2.40 × 103 kg ddistance moved = 233 m time = 17 sec speed = constant We have…