If 30 hp are required to drive a 1200 kg automobile at 50 km/hr on a level road, what is the total retarding force due to friction, air resistance and so on.

Q: A child pulls on a wagon with a horizontal force of 75N. If the wagon moves horizontally a total of…

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Q: Suppose 65 passengers with an average mass of 75kg are transported by a ski lift to a height of…

A: Given: The number of passengers: n = 65. The average mass of a passenger: m = 75 kg. The height…

Q: A piano mover is pushing a 240-kg piano a distance d=5.0 m with a force parallel to the floor of…

A: The given data are: m=240 kgd=5 mFp=480 Nμ=0.18u=m/s Here, m denotes the mass, d denotes the…

Q: A 1900-kg car experiences a combined force of air resistance and friction that has the same…

A: Given data: Mass of the car, m=1900 kg Speed of the car, v=27 m/s Power difference,

Q: A 2.1 × 103 -kg car starts from rest at the top of a 5.0-m-long driveway that is inclined at 20°…

A: Given data: Mass of car, m = 2.1 × 103 kg Length of driveway, L = 5 m  angle of inclination, θ = 20°…

Q: A 0.25-hp motor is used to lift a load at the rate of 5.0 cm/s. How great a load can it raise at…

A: Given: The power is 0.25 hp. The constant speed of the motor is 5 cm/s.

Q: What average power is needed to accelerate a 1 kg soccer ball from rest to 36 km/hr in 0.1 seconds?…

A: Given data: Mass (m) = 1 kg Initial velocity (v0) = 0 m/s Final velocity (v) = 36 km/hr Time (t) =…

Q: A record for stair climbing was achieved by a man who raced up the 1600 steps of the Empire State…

A: Given data from question,  Number of steps = 1600 Height = 320m Time taken = 10.2min Weight of man =…

Q: A cable exerts a constant upward tension of magnitude1.25 x 104 N on a 1.00 x 103-kg elevator as it…

A: Given,The magnitude of upward tension, T=12500NMass of the elevator, m=1000kgThe distance the…

Q: The power delivered by a constant force is given by P=FO-vO, The power exerted by gravity as it…

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Q: If a car generates 17.3 hp when traveling at a steady 81.3 km/hr, what must be the average force…

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Q: How long will it take a 844-kg car with a useful power output of 48.5 hp (1 hp equals 746 W) to…

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Q: A mass of 47 kg is moving horizontally as a force of 190 N, directed at 25° below the horizontal, is…

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Q: . A car of mass 900 kg is initially travelling at 50 km/h. If the speed increases so that its…

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Q: Without pedaling, the rider rides down a 3.0% slope with constant speed of 7.0 m/s. With how much…

A: Slope = 3% therefore, θ = Tan-1(0.03) = 1.718oV = 7 msmass (m) = 80 kg

Q: A 900-kg car cruising at a constant speed of 60 km/h is to accelerate to 100 km/h in 4 s. The…

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Q: An engine of mass 65S tonnes pulls a train of mass 300 tonnes up an incline of 30°. The train starts…

A: (a) Using kinematic expression for acceleration v2=u2+2asa=v2-u22s=65 km/h2-0223 km1 m/s3.6 km/h21…

Q: As a part of a charity fund-raising drive, a marathon runner with mass of 75 kg runs up the stairs…

A: Work done required for mass m to climb height h will be against gravity. Wreq = mgh we Also know,…

Q: ,2 54. A 5.0-kg box has an acceleration of 2.0 m/s when it is pulled by a horizontal force across a…

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Q: Calculate the average power necessary for a 55.8 kg person to run up a 5.0 m high, sloped hill, in…

A: The expression for the average power is P=Wt Here,P  is the average power,  iWs the work done by…

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…

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Q: A 2.1 x 103-kg car starts from rest at the top of a 5.5-m-long driveway that is inclined at 15° with…

A: Given Data : The mass of the car is given as M=2.1×103 Kg The length of the driveway is given as D =…

Q: Procopio is driving a car (m = 1000 kg) at v1 = 11.11 m/s when he stepped on the brakes. The car…

A: Given data: Mass of car is, m=1000 kg. Initial speed is of, u=11.11 m/s. Distance travelled by car…

Q: When its 75-kW (100-hp) engine is generating full power, a small single-engine airplane with mass…

A: Given: m = 700 kg, v = 2.5 m/s, g = 9.8 m/s² Where  m = mass of the engine, g = acceleration due to…

Q: A 2.5 kg mass is initially at rest on a horizontal surface. An applied force acts in the +x…

A: According to work energy theorem,

Q: Suppose a 825-kg car can produce a useful power output of 45.5 hp (1 hp = 746 W). How long, in…

A: a)Calculate the work done using work energy theorem.

Q: A particle of mass 0.4 kg moves a long a straight line according to x(t) = 2t + t3, where t is in…

A: Power is defined as time derivative of the work done on a system, or work done per unit time. Work…

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

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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: If a car generates 15.6 hp when traveling at a steady 96.1 km/hr, what must be the average force…

A: Steady velocity or uniform velocity is the velocity of an object moving without any acceleration ,…

Q: A car accelerates uniformly from rest to 24.2 m/s in 8.46 s along a level stretch of road. Ignoring…

A: The initial velocity of car = 0 m/s.The final velocity = 24.2 m/s.The time taken  by the car to…

Q: When its 75-kW (100-hp) engine is generating full power, a small single engine airplane with mass…

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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 new record for runningthe stairs of the Empire State Building was set on February 4, 2003.The 86…

A: The total height gained by the runner to run 1576 steps is:

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 average mechanical power (W) must a 76.5kg mountain climber generate to climb to the summit of…

A: Given that: m=76.5 kgg=9.8 m/s2h=405 mt=46 min=2760 sec W=?

Q: If 10.00 hp are required to drive a 2,000-kg automobile at 80 km/h on a level road, what is the…

A: Given :  Power, P = 10.00 hp  mass, m = 2000 Kg  Velocity, v = 80 Km/h  Find : Total retarding force…

Q: A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or…

A: Work is done whenever the given two conditions are satisfied: a force acts on the body. there is a…

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

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Q: What is the power output for a 60.0-kg woman who runs up a 3.00 m high flight of stairs in 3.50 s,…

A: The mass of the woman is m=60 kg. The height is h=3 m. The time is t=3.50 s. The final speed is vf=2…

Q: How high a hill can a car coast up (engine disengaged) if work done by friction is negligible * and…

A: Given data:  Initial Speed of the car (V0) = 155 km/h Free falling acceleration (g) = 10 m/s2…

Q: A box is supported by a 5.2 N vertical force and carried 2.3 m horizontally across a room at…

A: Work done by a force F in displacing an object by some distance 's' is given by- W=F.s=Fscos(θ)…

Q: What is the power output for a 60.0 kg person who runs up a 3.00 m high flight of stairs in 3.50 s,…

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Q: Suppose a 825-kg car can produce a useful power output of 45.5 hp (1 hp = 746 W). How long, in…

A: