How long would it take a  2.5*10^5 airplane with engines that produce  135MW of power to reach a speed of  236 m/s and an altitude of  12 km if air resistance were negligible? b.  If it actually takes 842s , what is the power?

Q: Sam, whose mass is 68 kgkg , straps on his skis and starts down a 58 mm -high, 20∘20∘ frictionless…

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Q: A 6 slug mountaineer is reaching the top of Mt. Fuji that is 12,336 ft high. The mountain makes a…

A: Work done against gravity is its potential energy. W=Mgh…

Q: An air puck of mass m1 = 0.28 kg is tied to a string and allowed to revolve in a circle of radius R…

A: Write the given values. m1=0.28 kgR=1.4 mm2=1.4 kg

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Q: #13

A: 9)the power is the energy per unit time or work done per unit time. the work is to be done to rise…

Q: Calculate P3 (in W). Find the total power (in W) supplied by the source.

A: The net resistance (Rnet) of the circuit shown can be computed as follows. The net current (I) can…

Q: While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body…

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Q: A sled is given a push across a horizontal surface. The sled has a mass m, the push gives it an…

A: Given Data: Mass of the sled = m.Initial speed of the sled (v) = 3.40 m/s.Coefficient of kinetic…

Q: Adam drove a bike 1260 m with an average speed of 115m/s. Suppose he applied the brakes to reduce…

A: According to the work-energy theorem, the work done by the brakes will be equal to the change in…

Q: You are an athlete who masses 80 kg. When doing a pushup you lift a total of about 56 kg a distance…

A: The gravitational force is, F=mg Here, F is the force, m is the mass and g is the acceleration due…

Q: 30. John is riding an elevator. If John notes that the elevator travels upwards with a speed of 0.23…

A: mass (m)=75 kg acceleration due to gravity(g)=9.8 m/s2 speed(v)=0.23 m/s

Q: A 325 HP motor moves a car with constant speed down a highway. Most of the power is to overcome…

A: Given: Power,P=325hp=325×745.7WVelocity,v=26.5m/s Friction is defined as the tension or disquiet…

Q: You’re riding an amusement park ride down waterfalls, and you accelerate with a mass of 82 kg a…

A: Given data: Mass (m) = 82 kg Initial velocity (v0) = 1.76 m/s Final velocity (v) = 12.49 m/s Time…

Q: 4 A -2 4 -2 Consider the two vectors, A and B, in the figure. The x and y components of both vectors…

A: Addition of two vectors A→=axi^+ayj^+azk^ and B→=bxi^+byj^+bzk^ is given by-…

Q: A person in good physical condition can put out 100 W of useful power for several hours at a…

A: We know that one people produces an output of 100 W so the number of people that can produce 5 kW of…

Q: A 1400-kgrace car can go from 0 to 100 km/h in 4.8 s . What average power is required to do this?…

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Q: You push down on a 4.0 N box against the floor for 2 minutes. How much work was done? How much power…

A: Answer Given  Weight of box w = 4 N Time t = 2 minutes

Q: A 10,000 kg streetcar starts from rest when the conductor powers on the electric drive motor. If…

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Q: Suppose a car travels 108 km at a speed of 30.0 m/s, and uses 1.90 gallons of gasoline. Only 30% of…

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Q: Suppose a 74 kg sprinter, starting from rest, runs the first 9 m in 3 s at constant acceleration, a…

A: Given Mass of a sprinter = 74 kg sprinter starting from rest, Distance traveled in first 3 sec = 9 m…

Q: 2. An electric drive features a 24 kWh battery pack and has a range of 170 km at a constant speed of…

A: We will answer the question by using expression relating power and energy. The details are as…

Q: A certain handcrank generates power at 75W. How long will it need to be run to fully charge a…

A: Power: The energy per unit time is known as power. Power = Energy/time

Q: An electric motor is rated to have a maximum power output of 0.79 hp. If this motor is being used to…

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Q: Two students climb the ladder up the 25m high light towers at the football field.  Alex weighs 80kg,…

A: Note :- : Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the…

Q: A 660kg car is moving with an initial speed of 10.0 m/s. A deer jumps into the road and the driver…

A: Given data: Mass (m) = 660 kg Initial speed (v) = 10 m/s Time (t) = 4.0 sec Need to determine the…