A box of mass 20kg is raised to a height of 30m? a. How much work is done on the box? b. If it raised within 10s, how much power is expended in doing this work?

Q: 1. A student of mass 40 kg caries a bag weighing 5000g from the ground floor to his class on the…

A: Work done by boy W= mgh Given that m= 5kg  h= 0.7m

Q: How much work must be done to stop a 1100-kg car traveling at 111km / h ? (Hint: You will need to…

A:

Q: A 169.5 lb hiker is able to ascend a 1,980.0 ft high slope in 1 hour and 45 minutes. (a) How much…

A: Given : F = 169.5 lb d = 1980 ft t = 1 hour 45 minutes = 6300 seconds

Q: A cheetah has 5 joules of kinetic energy and runs up a 5 m hill. When it gets to the top of the…

A: Given- The kinetic energy of Cheetah (K.E) = 5 J Height cheetah can cover (h) = 5 m,

Q: It takes a force of 21,714 lb to compressa coil spring assembly on a New York City Transit Authority…

A: Hooke's law: The force needed to extend or compress a spring by some distance is proportional to…

Q: At the low point in its swing, a pendulum bob with a mass of 0.7 kg has a velocity of 11 m/s. (a)…

A:

Q: An elevatoris able to raise 1,000kg to a height of 40m in 15 seconds.  a. How much work does the…

A:

Q: A bicycle and rider going 14 m/s approach a hill. Their total mass is 62 kg. (a) What is their…

A: Given values: speed v = 14 m/s mass m = 62 kg

Q: 3. A car of mass 1500kg is accelerated from rest to a) What is the final kinetic energy of the ca b)…

A:

Q: 1. A student of mass 40 kg caries a bag weighing 5000g from the ground floor to his class on the…

A: Given Mass of boy is 40kg Mass if bag is 5000g or 5 kg Total mass is 40+5 = 45 kg

Q: A football weighing 5 N is dropped from a height of 4.1 m above the ground. What is the kinetic…

A:

Q: how much work is required to increase a 1200 kg car's speed from 35 mph to 65 mph? how many J

A: The car's mass is, m=1200 kg The initial speed of a car is, u=35 mph=35×0.447 m/s=15.645 m/s The…

Q: A force of 434.0 N is exerted on a 1,250 N car while moving it a distance of 2.65 m. How much work…

A: Express the relation for the work done on the car. W=Fd Here, W is the work done, F is the force…

Q: An automobile having a mass of 1250 kg is traveling at 40 m s¯1. What is its kinetic energy in kJ?…

A: Given Kinetic energy can be determined as

Q: A 4.0-kg battery-operated toy has a speed of 7.5 m/s at point C and kinetic energy of 205 J at point…

A: concept used:

Q: 1. A student of mass 50 kg caries a bag weighing 4000g from the ground floor to his class on the…

A:

Q: A 5.4 kg textbook is raised a distance of 23.6 cm as a student prepares to leave for school. How…

A: Given : m = 5.4 kg d = 23.6 cm = 0.236 m

Q: A student who weighs 569N climbs a stairway (vertical height of 4.3 m) in 26 s. (a) How much work is…

A:

Q: A horse performs 15000 joules of work pulling a wagon for 20 seconds. What is the horse's power?

A: Work done by horse by pulling wagon =15000jule time = 20s

Q: A student who weighs 546 N climbs a stairway (vertical height of 4.5 m) in 24 s. (a) How much work…

A:

Q: A 430g book is dropped froma height of 1.9m. What is the kinetic energy of the book at the moment it…

A: Kinetic energy gained equals the change in potential energy. Ekinetic=Utotal-Uhalfway=mgh-mgh2=mgh2

Q: A 100-g ball is falling through syrup in a glass at a speed of 1.0 cm/s. How much work is done by…

A: Given, mass of ball: m=100 g=0.1 kg speed of ball: v=1.0 cm/s=0.01 m/s distance covered by ball:…

Q: A car's engine supplies 1000 N of force for 20 m in 5 seconds. What is the work done by the engine…

A: Given data: A car's engine supplies a force of, F= 1000 N  For a distance of, d= 20 m During the…

Q: A 4.7 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a…

A: Given,

Q: A woman is rollerblading through a park. If she starts from rest, and then reaches a kinetic energy…

A: Since the woman is starting from rest, her initial kinetic energy will be zero. Final kinetic energy…

Q: 10. A machine is used to move a 700 N object by 2.00 m by exerting 400 N of force through a distance…

A:

Q: 11. A 2.0-kg piece of gelatin is made to slide down a ramp from point shown. The total distance…

A:

Q: How LONG DOES IT TAKE for a 75 Watt light bulb to burn out if it can 4 p perform 600,0dO J of work…

A:

Q: 5. A 98-N sack of grain is hoisted to a storage room 50 m above the ground floor of a grain…

A:

Q: How much work does a sled dog do if she pulls with a force of 4.3 N on a horizontal track over a…

A:

Q: How much work does a sled dog do if she pulls with a force of 2.9 N on a horizontal track over a…

A: We know that,If force and displacement are in same direction, Work done= Force x Displacement…

Q: A heavy rope, 50 ft long, weighs 0.9 lb/ft and hangs over the edge of a building 140 ft high. a. How…

A: Given: Length of rope (l) = 50 ft. Weight of rope (w) = 0.9 lb/ft. Height of building (h) = 140 ft.

Q: A student who weighs 547 N climbs a stairway (vertical height of 2.9 m) in 21 s. (a) How much work…

A: weight = mg  = 547 N Height = 2.9 m time (t) = 21 seconds   A) Work done = change in potential…

Q: A pump is required to lift 800 kg (about 200 gallons) of water per minute from a well 10 m deep and…

A: Given: Mass m=800 kg Depth h=10 m Speed v=20 m/s Time  t=1 min Standard conversion used: 1…

Q: A 0.600-kg ball that was dropped from the top of building hit the ground in 1.0 second. a) What was…

A: Given Data : The mass of the ball is given as m = 0.600 Kg. The time taken by the ball to hit the…

Q: A force of 45.6 lb is used to push a box 10.3 ft across a level floor. (a) How much work was done on…

A: Given,  Force acting on the box, F = 45.6 lb Displacement of box, x = 10.3 ft For calculating work…

Q: A student who weighs 553 N climbs a stairway (vertical height of 4.2 m) in 20 s. (a) How much work…

A: Answer:-  Given  Force acting on the student (F) = 553 N  Vertical height (h) = 4.2 m  Time (t) = 20…

Q: SA1) A 50-kg cavan of rice is pulled along a 10-m horizontal ramp with a force of 750 N. If it is…

A:

Q: Question 3 A big ship with a mass of 5.95 x 10 kg has a speed of 11.0 m/s at some instant. A. What…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

Q: A donkey pulls on a wagon with 25 N of force until it completes 150 J of work how far did the donkey…

A: Given- Force applied by donkey (F) = 25 N Work (w) = 150 J

Q: An automobile having a mass of 1250 kg is traveling at 40 m·s−1. What is its kinetic energy in kJ?…

A: To find the kinetic energy of the automobile and required amount of work to halt it.We are given…

Q: A force of 20 lb is required to hold a spring stretched 2 in. beyond its natural length. How much…

A:

Q: A 61 kg skateboarder starts at rest on the top of a 8 meter ramp. After going down the ramp, what is…

A: The conservation of energy is, 12mv12+mgy1=12mv22+mgy20+mgR=12mv22+0v2=2gR

Q: A 55 kg hiker starts at an elevation of 1275 m and climbs to the top of a 3300 m peak.  What is the…

A: Given data The mass is m=55 kg The first height is, h1=1275 m The final height is h2= 3300 m The…

Q: A football weighing 5 N is dropped from a height of 7.6 m above the ground. What is the kinetic…

A:

Q: 1. A student of mass 40 kg caries a bag weighing 5000g from the ground floor to his class on the…

A: Since all the questions are different, as per Bartleby guidelines only 1st one can be answered at a…

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.