Suppose a car travels 108 km at a speed of 20.0 m/s, and uses 2.10 gallons of gasoline. Only 30% of the gasoline goes into useful work by the force that keeps the car moving at constant speed despite friction. (The energy content of gasoline is 1.30 ✕ 108 J per gallon.) What is the force (in N) exerted to keep the car moving at constant speed?

Q: ohn, of mass 82.4 kg can do work for about 2.0 minutes at the rate of 1.0 hp. How long will it take…

A: Given data: Mass (m) = 82.4 kg Power (P) = 1.0 hp Height (h) = 12.0 m 1 hp = 746 watts Required:…

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

A:

Q: A single force acts on a 1.4 kg particle-like object in such a way that the position of the object…

A: Speed is given by,

Q: During a long-distance race, a runner weighing 60.6 kg travels at a speed of 3.10 meters per second.…

A:

Q: .An advertisement claims that a certain 1300 kg car can accelerate from rest to a speed of 25 m/s in…

A: Please see the answer below

Q: A drone of mass 1.4 kg is flying across the sky 64 m above ground at the speed of 19 m/s   I fyou…

A:

Q: Suppose a person pushes a box over a distance of 3.88 m with a constant force of 375.2 N. How much…

A:

Q: A 4.8 kg box has an acceleration of 2.5 m/s² when it is pulled by a horizontal force across a…

A: Given: The mass of the object is 4.8 kg. The acceleration of the object is 2.5 m/s2. The coefficient…

Q: A 1.5 kg object slides across a horizontal surface with an initial speed of 5.61 m/s. If the object…

A: Given data:  Mass (m) = 1.5 kg Initial velocity (Vi) = 5.61 m/s Final velocity (Vf) = 0 m/s…

Q: h potential energy due to gravity would a person have if they were standing on top of a building…

A: Given:-  The mass of the person is  m = 76.1 kg  The height of the building h = 51.7 m  Find:- How…

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

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Q: When an 78.8-kg adult uses a spiral staircase to climb to the second floor of his house, his…

A:

Q: What average mechanical power (in W) must a 61.5 kg mountain climber generate to climb to the summit…

A: The mechanical power of the climber can be found as, Here, W and t represent the work-done and…

Q: An object of mass 7.39 kg is moving with an initial kinetic energy 394 Joules. If the object…

A: Given data: Mass of the object, m=7.39 kg Initial kinetics energy of the object, K.Ei=394 J…

Q: An applied force of 40.0 N j lifts an object straight up a distance of 1.20 m. If the object has a…

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Q: An applied force of 14.6 N acts on a 2.50 kg mass that is initially at rest. Over a distance of 2.36…

A:

Q: In the figure, a 0.24 kg block of cheese lies on the floor of a 950 kg elevator cab that is being…

A: (a)The net force on the block is,

Q: When an 85.4-kg adult uses a spiral staircase to climb to the second floor of his house, his…

A:

Q: Several forces are applied to an object. If the object moves 40 m along the horizontal, and if one…

A: Given: The distance moved by an object is d=40 m. The force in the opposite direction of motion is…

Q: A 5.0-kg cart is moving horizontally at 4.0 m/s. In order to change its speed to 6.0 m/s, the net…

A: Given: Mass of cart m=5.0 kg Initial speed u=4.0 m/s Final speed v=6.0 m/s To find net work done in…

Q: You stretch a spring a distance of 9.1 cm from its equilibrium length with a force of 2.97 N. How…

A: Given Data: The initial stretch in the spring at a distance xi is, xi=9.1 cm The applied force is,…

Q: A mass of 60 kg is moved vertically upwards through a distance of 6 m. If the gravitational…

A: Mass, m = 60 kg Distance, d = 6 m

Q: The net work exerted on a box filled with fresh berry during its motion from a point O to a point A…

A: Net work exerted or work done, w= 100 J Combined mass of box  and fruits, m=10 kg Initial speed of…

Q: Calculate the total work done by the system from x = 1.40 m to x =4.80 m when force applied on the…

A: Given data : Force, Ft=5.00Nmx i^ + 7.00 Nm2x2 j^ + 9.00 Nm3x3 k^ Displacement x1=1.40 m…

Q: A proton (mass m = 1.67 × 10-27 kg) is being accelerated along a straight line at 2.70 × 1011 m/s2…

A: (a)consider the kinematic equation.Vf2=v02 +2as                (i)             where,     vf=final…

Q: A block is acted on by a force that varies as (1.9×104N/m)x for 0≤x≤0.21m, and then remains constant…

A: SOlution: Given that Force varies as (1.9×104N/m)x for 0≤x≤0.21m,  Force remains constant at 3990 N…

Q: A student wearing frictionless in line skates on a horizontal surface is pushed by a friend with a…

A: The given data are: F=45 NKf=352 JKi=0 J Here, Ki denotes the initial kinetic energy, Kf denotes the…

Q: When a car of mass 1167 kg accelerates from 10.0m / s to a certain final speed, 4.00x10 ^ 5J of work…

A: Given Mass m = 1167 kg Initial velocity u = 10 m/s Work done = 4 × 105 J

Q: A 1250 kg truck is moving at 85 km/h. If the speed of the truck is changed to 60 km/h by applying a…

A:

Q: A skier of mass 70.0 kg is pulled up a slope by a motor drivencable. (a) How much work is required…

A: (a) The vertical distance travelled by the skier is

Q: If an object of mass 2.00 kg is dropped from rest into free fall from some height where it has +5.00…

A: When the object is at rest at some height, it has zero kinetic energy and its potential energy is…

Q: What is the average useful power output (in w) of a person who does 6.80 x 106 J of useful work in…

A: Given: Work done by the person, W = 6.80 × 106 J time taken to complete it, t = 7.60 h = 7.60 h ×…

Q: An object, which is initially at rest on a frictionless horizontal surface, is acted upon by four…

A: Acceleration of the object F→net=ma→a→=F→netma→=11.1 Ni^+28.6 Nj^+52.1 N-i^+17.4 N-j^16.0…

Q: When an 81.0 kg adult uses a spiral staircase to climb to the second floor of his house, his…

A: Given: mass of adult person, M = 81 kg mass of child, m = 18 kg  change in gravitational potential…

Q: Pushing a heavy box of 100 N up along a frictionless slope, the speed decreases at a rate of 1 m/s?.…

A:

Q: as a 2kg object moves from (2i+5j)m to (6i-2j)m, the constant resultant force acting on it is equal…

A: Given that the mass of object is m=2.0kgThe object moves from S1=2i+5j to S2=6i-2jThe force on the…

Q: A 65g Frisbee is thrown from a point 1.20 m above the ground with a speed of 12.00 m/s. When it has…

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Q: What power is needed to move a 13.4 kN car up an 8 degree incline with a constant speed of 80 kph…

A: Given: Mass of car, m = 13.4 kN = 1366.42 kg Angle = 8 degree Speed, v = 80 kph = 80 X 5/18 = 22.22…

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…

A:

Q: If it takes 4.00 J of work to stretch a Hooke's-law spring 5.0 cm from its unstressed length,…

A: Work done to stretch the spring from its unstretched length to 5 cm  = 4 Joules Using, formula for…

Q: A truck of mass 200 kg starts with an initial velocity of 1.00 m/s and travels in a straight line…

A: Mass of a truck,

Q: What average mechanical power (in W) must a 61.5 kg mountain climber generate to climb to the summit…

A: According to work energy theorem, the work required to climb the hill is,Substitute the values,

Q: Suppose that a spring has a natural length of 10 cm, and that it requires a force of 20 Newtons to…

A: Write the given values with the suitable variables. x0=10 cm=0.1 mF=20 Nx=20 cm=0.2 m Here, x0 is…

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,…

A:

Q: how much work is done on a cart by a force F=(10i+5j)kN that causes a displacement of d=(2i+0j)m?

A: The work done is given by  W =  F→ . d→ where, F is the force vector and d is the displacement…