A child is a the top of a treehouse 4.20 m above the ground. She is lifting a bucket of snacks via a rope with a mass of 3.5 kg. If her power output is 17 W, how much time will it take her to lift it directly upward at constant velocity? Assume no frictional forces. Give your answer in seconds.

A child is a the top of a treehouse 4.20 m above the ground. She is lifting a bucket of snacks via a rope with a mass of 3.5 kg. If her power output is 17 W, how much time will it take her to lift it directly upward at constant velocity? Assume no frictional forces. Give your answer in seconds.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 76P: Calculate the power output needed for a 950-kg car to climb a 2.00 slope at a constant 30.0 m/s...

See similar textbooks

Related questions

Q: A man pulls a 6 kg luggage along a level road for 12 m exerting a force of 15 N at an angle of 20…

Q: A 95 kg man runs up a 20 m high stairs at a constant speed. If it takes him 8 seconds to reach the…

A: The rate of doing work is called power.

Q: A man manages to ride a bicycle (total mass 95 kg), 10 m/s from rest, up a hill 230 m high against…

A: Given:mass,m=95 kghigh,∆h=230 mspeed,v=10 m/sdistace,d=1500 mTime,t=6 minute=360 sec.Now,Total work…

Q: A 72.3 kg student runs up the stairs of a football stadium to a height of 11.1 m above the ground in…

A: Power is defined as the Work Done or Energy per unit time.P=Et The energy of an object of mass m at…

Q: What average power does a 1,565 kg car need to go from 0 to 12.6 m/s in 6.86 seconds? Assume a…

Q: a = 1.2 ms? A Smart Car accelerates from rest as shown. 12. If the constant acceleration occurs over…

A: m=Mass of smart car=860 kga=Acceleraiton of car=1.2 m/s2s=Displacement of car=30 m

Q: A 520-kg dragster accelerates from rest to a final speed of 105 m/s in 390 m, during which it…

Q: A toad with mass of 188 g leaps into the air to catch a fly. If the toad's jump was at an angle of…

A: Given: Toad's mass, m=188 g=0.188 kg Toad's jumping angle w.r.t horizontal, θ=35° Initial velocity,…

Q: A 5.0 kg mass is falling from a height of 10.0 m with a speed of 2.0 m/a what is it's totally…

Q: A 150 kg yak has an average power output of 120 W. How long can a yak climb a 1.2 km high mountain?

A: Given, Mass of the yak (m) = 150 kg Power output (p) = 120 Watt. Height of the mountain (h)= 1.2 km…

Q: A 40.0 kg jogger runs up the slope described in the fiqure. She maintains a constant speed of 4.00…

A: Given Mass of jogger(m) = 40Kg Speed (s) = 4m/s

Q: I have a motor that is rated for 6000 W. What is the maximum amount of work that the motor can do in…

A: Given data The power of the motor is P = 6000 W The time taken to work is t = 10 s The mass of the…

Q: A 2.00 kg particle has a speed of 4.00 m/s at point A and kinetic energy of 9.50 J at point B. What…

Q: If a ski lift raises 100 passengers averaging 660 N in weight to a height of 150 m in 60.0 s, at…

A: Given information: Here, mg is the average weight of the passenger, h is the height attained by the…

Q: How much time is required for a elevator to lift a 2000 kg load up 28 m from the ground level, if…

A: Given data: Mass m = 2000 kg Distance from ground level d = 28 m Power P = 13 kW

Q: Calculate the power output needed for a 952-kg car to climb a 2.00° slope at a constant 33 m/s while…

Q: What would be the power output in hp of a 1750 kg car if it can ascend to the top of a 285 m high…

A: Take the bottom of the hill to be at height zero. The potential energy of the car at the bottom of…

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 warehouse worker uses a forklift to raise a crate of pickles on a platform to a height 3.75 m…

Q: A toad with mass of 180 g leaps into the air to catch a fly. If the toad's jump was at an angle of…

Q: An advertisement claims that a 1000 kg car can accelerate from rest to a speed of 20 m/s in a time…

A: mass = 1000kg v1= 0m/s; v2=20m/s t= 5sec. K.E1= 0 (car starts from rest) K.E2= (1/2)* 1000*…

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: An elevator has a mass of 4500 kg and can carry a maximum load of 1800 kg. At full load, it is…

Q: A 28 kg child on a swing is traveling at 4.2 m/s and has 315 J of total mechanical energy. What is…

Q: metres and the velocity is 10.3 m/s. What is the kinetic energy (in J) of the rocket at this…

A: The answer is below

Q: What is your average power if you lift a 36.1 kg box at a constant speed to a height of 1.31 m in…

A: Calculate the work required for the to lift the mass. W = increase in potential energy of the mass…

Q: A skier of mass 77 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to…

A: Distance for which he was pulled,d= 55m Angle of slope with horizontal= 30°

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 1080 kg car accelerates at a rate of 2.1 m/s/s over a distance of 18 meters. How much work was…

A: Given, mass of the car, m = 1080 kg acceleration of the car, a = 2.1 m/s2 distance traveled, d = 18…

Q: You're riding a toboggan down an icy run to a frozen lake, and you accelerate the 80.0-kg…

A: Given : m=80kg u=1m/s v=2m/s t=2s

Q: A object 2 kg is moving in one dimension with a velocity given by V(t)= 1 / 2 t^2 at t=4 s.…

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: A bowler accelerates a 8.5 kg bowling pin from rest to 15 m/s. If this motion takes 1.75 s, what is…

Q: A force F = 3ti acts on a mass m and moves it with a velocity v = 0.5t2i .The instantaneous power…

A: Given that, Power is the dot product of force and velocity.

Q: What minimum horsepower must a motor have to be able to drag a 380 kg box along a level floor at a…

A: The frictional force acting between box and floor is, F=μmg (I)…

Q: A motor has a power output of 1000 W. How fast would this motor lift a 20 kg mass to a height of 10…

A: Motor would lift 20kg to height of 10m in 1.96 seconds

Q: What average mechanical power (in W) must a 72.0 kg mountain climber generate to climb to the summit…

A: Given : Mass of the climber, m = 72 kg Height of the hill, h = 345 m time taken, t =…

Q: A 2000 kg car can accelerate from rest to 50 m/s in 4.2 seconds. How much power does the engine…

A: The initial speed of a car is, u=0 m/s The final speed of a car is, v=50 m/s The car's mass is,…

Q: What average mechanical power (in W) must a 70.5 kg mountain climber generate to climb to the summit…

A: Write the given values with suitable variables. m=70.5 kgh=305 mt=47 min=47×60 s=2820 s Here, m, h,…

Q: A hydroelectric generator converts kinetic energy of water into electrical energy. Each second 2264…

A: Given: The mass of the water is m =2264 m3 The height of the waterfall is h=191 m’ Acceleration due…

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 much power is required to raise a 30-kg crate a vertical distance of 6m in a time of 4 seconds?…

A: The potential energy of a body is given by PE = mgh, where m = the mass of the body g = acceleration…

Q: While cruising along a level ground in a one horse open sleigh at 4.0 m/s, Santa cracks the whip and…

Q: Calculate the power output needed for a 952-kg car to climb a 2.00° slope at a constant 33 m/s while…

Q: A toad with mass of 190 g leaps into the air to catch a fly. If the toad's jump was at an angle of…

A: given , mass of the toad , m = 190 g =0.190 Kg Angle with respect to the horizontal , θ = 37∘…

Q: A weightlifter raises a 150-kg barbell from the floor to a height of 2.2 m in 0.80 s. What is his…

Question

100%

A child is a the top of a treehouse 4.20 m above the ground. She is lifting a bucket of snacks via a rope with a mass of 3.5 kg. If her power output is 17 W, how much time will it
take her to lift it directly upward at constant velocity? Assume no frictional forces. Give your answer in seconds.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

A 500-kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is its average power output in watts and horsepower if this takes 7.30s?
Calculate the power output needed for a 950-kg car to climb a 2.00 slope at a constant 30.0 m/s while encountering wind resistance and friction totaling 600 N.
A cyclist in a race must climb a 5 hill at a speed of 8 m/s. If the mass of the bike and the biker together is 80 kg, what must be the power output of the biker to achieve the goal?
An electric scooter has a battery capable of supplying 120 Wh of energy. If friction forces and other losses account for 60.0% of the energy usage, what altitude change can a rider achieve when driving in hilly ter-rain if the rider and scooter have a combined weight of 890 N?
A student expends 7.5 W of power in lifting a textbook 0.50 m in 1.0 s with a constant velocity. (a) How much work is done, and (b) how much does the book weigh (in newtons)? The answers to Confidence Exercises may be found at the back of the book.
“ E=K+Uconstant is a special case of the work energy theorem.” Discuss this statement.
A 100 — kg man is skiing across level ground at a speed of 8.0 m/s when he comes to the small slope 1.8 m higher than ground level shown in the following figure. (a) If the skier coasts up the bill, what is his speed when he reaches the top plateau? Assume friction between the snow and skis is negligible. (b) What is his speed when he reaches the upper level if an 80 — N frictional force acts on the skis?
A sled stalls from rest at the top of a snow-covered incline that makes a 22 angle with the horizontal. After sliding 75 m down the slope, its speed is 14 m/s. Use the work-energy theorem to calculate the coefficient of kinetic friction between the runners of the sled and the snowy surface.
Two students throw identical snowballs from the same height; both snowballs having the same initial speed vo ( Fig. 4.25). Which snowball has the greater speed on striking the level ground at the bottom of the slope? Justify your answer using energy considerations. Figure 4.25 Away They Go! See Short Answer Question 16.
A baseball of mass 0.25 kg is hit at home plate with a speed of 40 m/s. When it lands in a seat in the left-field bleachers a horizontal distance 120 m from home plate, it is moving at 30 m/s. If the ball lands 20 m above the spot where it was hit, how much work is done on it by air resistance?
In a Coyote/Road Runner cartoon clip (https://openstaxcollege.org/l/21coyroadcarcl), a spring expands quickly and sends the coyote into a rock. If the spring extended 5 m and sent the coyote of mass 20 kg to a speed of 15 m/s, (a) what is the spring constant of this spring? (b) If the coyote were sent vertically into the air with the energy given to him by the spring, how high could he go if there were no non-conservative forces?
A person in good physical condition can put out 100 W of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time: (a) How many people ‘would it take to nm a 4.O0-kW electric clothes dryer? (b) How many people would it take to replace a large electric power plant that generates 800 MW?