A car with mass of 1143 kg accelerates from 0 m/s to 40.0 m/s in 10.0 s. Ignore air resistance. The engine has a 22.0% efficiency, which means that 22.0% of the energy released by the burning gasoline is converted into mechanical energy.  A.)What is the average mechanical power output of the engine?

Q: 5. A 55-kg block, starting from rest, is pushed a distance of 5.0 m across a floor by a…

A:

Q: A 53.0 kg cheetah accelerates from rest to its top speed of 33.3 m/s. (a) How much net work (in J)…

A: a)The required work done is,

Q: Under normal conditions the human heart converts about 12.4 J of chemical energy per second into…

A: (a) As 1 kilocalorie = 4186 J. Therefore, 1 cal = 4.186 J.  The energy in calorie used per second…

Q: A pump is required to lift 800 kg of water per minute from a well 16.0 m deep and eject it with a…

A: Given: Weight of water: m=800 [kg] Height: h=16 [m] Speed of ejecting out: v=15 [m/s]

Q: In the figure below, a block of mass m = 4.5 kg slides head into a spring of spring constant k = 320…

A: In this question we have to find the work done by the spring force, increase in thermal energy of…

Q: A 15.0-g bullet is accelerated from rest to a speed of 780 m/s in a rifle barrel of length 72.0 cm.…

A:

Q: A 1.8 kg book has been dropped from the top of the football stadium. Its speed is 4.8 m/s when it is…

A:

Q: 7. A container factory use a 370 W motor to operate a conveyor belt that lifts containers from one…

A: Given Mass lifted m = 250 kg Displacement h = 3.6 m Time taken t= 45 s Power P = 370 W

Q: A 63.0 kg cheetah accelerates from rest to its top speed of 31.5 m/s. HINT (a) How much net work (in…

A: (a) Using Work-Energy theorem, net work required is,

Q: The winning time for the 2005 annual race up 86 floors of the Empire State Building was 10 min and…

A: Dear student, this question contains more than three sub-parts. As per guide lines we will answer…

Q: A 2900kg roller coaster has an i tail velocity of 0m/s at point A on this frictionless track. A.)…

A: A roller coater,  Initial velocity, u = 0 m/s Mass of roller coaster, m = 2900 kg

Q: Championship swimmers take about 22 s and about 30 arm strokes to move through the water in a 50 m…

A: (a) (b)

Q: 2. A 59 kg person climbs up the stairs with a height of 5.5 m. a.How much work does the person do?…

A: Given , Mass of person( m) = 59 kg Height climbed by person (h)= 5.5 m

Q: The hike to the peak of Mount Hallasan on Jeju Island requires a climb of 1950 m of vertical…

A: Given that:- Mass of person=86kg Height of the peak of mountain=1950m

Q: (a) Calculate the energy in kJ used by a 55.0-kg woman who does 50 deep knee bends in which her…

A:

Q: A 1.8 book has been dropped from the top of the football stadium. Its speed is 4.8m/s when it is 2.9…

A: Energy of system is always conserved. It just changes its form. When only considered the kinematics,…

Q: A bicycle and rider going 14 m/s approach a hill. Their total mass is 93 kg. (a) What is their…

A: Given data: Initial velocity (v) = 14 m/s Mass (m) = 93 kg

Q: A 40.0 kg skier skis down a 12.0o slope from a height of 100.0 m to a height of 25.0 m.  1a) What…

A: Given data: The mass of the skier, m=40.0 kg. The angle of inclination of the slope, θ=12°. The…

Q: n the future pennies have become obsolete and a new type of furnace is invented that converts the…

A:

Q: A 25.0 kg child plays on a swing having support ropes that are 2.20 m long. Her brother pulls her…

A: It is given that,  α=42om=25 kgv1=0h=2.20 m

Q: 1.An electric motor with a 2 hp output drives a machine with an efficiency of 45%. What is the…

A:

Q: For exercise, an athlete lifts a barbell that weighs 400 N from the ground to a height of 2.00 m at…

A: Given, Weight of the barbell=400N height=2 m t=1.60 s

Q: A 1900 kg car is initially traveling 20 m/s. The driver presses down on the accelerator pedal and…

A: The energy possessed by an object , which is in motion , with velocity v is known as the kinetic…

Q: A 70 kg skier is traveling at 25 m/s downhill at point A, which is 80 m above the base, as shown.…

A: Given:-  m= 70 kg  h=80 m  u= 25 m/s  μ=0.15ϕ=20° Find:-  a. What is the initial mechanical energy…

Q: Under normal conditions the human heart converts about 12.7 J of chemical energy per second into…

A:

Q: A student evaluates a weight loss program by calculating the number of times she would need to climb…

A:

Q: A 64.0 kg cheetah accelerates from rest to its top speed of 30.7 m/s. HINT (a) How much net work (in…

A:

Q: A 64.0 kg cheetah accelerates from rest to its top speed of 32.5 m/s. (a) How much net work (in J)…

A: (a) According to the work energy theorem, W=∆K=12mv2-12mu2=12mv2-u2 Substitute the values, to find…

Q: A 20 kg crate is lifted 200 m above the ground in 5 minutes. (a) How much work is required to lift…

A: Given data: Mass (m) = 20 kg Height (h) = 200 m Time (t) = 5 minutes Required: Work done (W) and…

Q: You take a 13kg bag of lead pellets and drop it from 2m above the ground. a. How much gravitational…

A:

Q: A rubber ballI, with a mass of 40.0 grams is dropped from rest from a height of 1.20 m above the…

A: Given: Mass of ball, m=40.0 g Height above which the ball is at rest, y=1.20 m Maximum renounced…

Q: A. A student whose mass is 51 kg climbed the stairs from the first floor to the third floor, 15…

A: Answer:-  Given  Mass of a student (m) = 51 kg  Height of first floor to the third floor (h) = 15 m…

Q: A child whose weight is 287 N slides down a 6.60 m playground slide that makes an angle of 34.0°…

A: Given: The weight of the child: W = 287 N. The distance along the slide: d = 6.60 m. The angle the…

Q: In the figure below, a block of mass m = 1.5 kg slides head into a spring of spring constantk = 320…

A:

Q: 1. The third floor of a house is 10 m above the street level. How much work is required to lift a…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: (a) What is the efficiency of an out-of-condition professor who does 1.90 x 105 J of useful work…

A:

Q: For exercise, an athlete lifts a barbell that weighs 400 N from the ground to a height of 2.00 m at…

A: Given : Weight of the barbell, F  =  400 N Height to which the barbell is lifted, h = 2 m Time…

Q: 2. A 155-g baseball is thrown so that it acquires a speed of 35 m's. (a) What is its kinetic energy?…

A: a) The expression for find kinetic energy of the ball is KE=12mv2 Substitute values in the above…

Q: A bicycle and rider going 13 m/s approach a hill. Their total mass is 94 kg. (a) What is their…

A:

Q: Large meteors sometimes strike the Earth, converting most of their kinetic energy into thermal…

A: Given: mass of meteor, m = 109 kg speed of meteor, v = 25 km/s = 25000 m/s

Q: On a playground slide, a child has potential energy PE = 450.0 J at the top of the slide. The…

A: Given : (Potential energy at the top) PEtop= 450 J             (Kinetic energy at the top) KEtop = 0…

Q: A 20 kg child slides down a 3.0-m-high playground slide. She starts from rest, and her speed at the…

A: Given-Mass of child (m) = 20 Kg  initial height of play ground slide (hi) = 3 mFinal height of play…

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.