...ton cartne inclinedt of work18. What is the average power developed bya motor as it lifts a 400.-kilogram mass ata constant speed through a vertical distanceof 10.0 meters in 8.0 seconds?(1) 320 W(2) 500 W(3) 4,900 W(4) 32,000 W19. Determine the power developed by a manweighing 6.0 x 102 newtons who climbs a ropeat a constant speed of 2.0 meters per second.20. Student A lifts a 40.-newton box from the floorto a height of 0.30 meter in 2.0 seconds. StudentB lifts a 30.-newton box from the floor to aheight of 0.40 meter in 4.0 seconds. Comparedto student A, student B does(1) less work but develops more power(2) more work but develops less power(3) the same work but develops less power(4) the same work but develops more powerverticallyne inclinede would be(4) 9.8 Jeight to a heightcrane does work21. A 5.0 x 102-newton girl develops 250 watts ofpower as she runs up two flights of stairs to alanding a total of 5.0 meters vertically above herstarting point. Calculate the time required forthe girl to run up the stairs.x 103 WX 104 Wt of work that a0. seconds?5.0 x 103 J5.0 × 104 J22. A motor having a maximum power rating of8.1 X 104 watts is used to operate an elevatorwith a weight of 1.8 × 104 newtons. What isthe maximum weight this motor can lift at anaverage speed of 3.0 meters per second?(1) 6.0 × 103N(2) 1.8 × 104 NA watts exerts3 newtons onerage speed(3) 2.4 × 104N(4) 2.7 × 104N23. A girl weighing 500. newtons takes 50.0 secondsto climb a flight of stairs 18 meterr himt10x 103newton

“Since you have asked multiple question, we will solve the first question for you. If youwant any…

Answered: 18. What is the average power developed…

18. What is the average power developed by a motor as it lifts a 400.-kilogram mass at a constant speed through a vertical distance

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 67P: A person in good physical condition can put out 100 W of useful power for several hours at a...

See similar textbooks

Related questions

Q: i nedd som help with the question below

Q: 2. In the figure shown, the magnitude of the uniform electric field is E = 70 kN/C . Calculate the e...

Q: Show your solutions 1.A hair dryer pulls a current of 8000 mA from a 120 V power source. What is the...

Q: a) What is the total charge Q enclosed by an imaginary Gaussian surface of radius r? b) What is th...

Q: . A battery is connected across a light bulb with an internal resistance of 80 ohms. Using an ammete...

Q: A proton moves through a magnetic field 2.0 T at a speed of 5.00 x 106 m/s perpendicular to the fiel...

A: GIVEN: magnetic field B=2 T speed v=5×106 m/s

Q: How will Carbon Dioxide help the Martian atmosphere?

A: In this question we have to explain how carbon dioxide helps the Martian Atmosphere. Please give pos...

Q: Problem 19-20. A ball is shot from the top of a building with an initial velocity of 18m/s at an ang...

Q: Two resistors R1 = 6 Ω and R2 = 12 Ω are connected in parallel to each other and in series to R3 = 2...

Q: 1. *A 13,500 kg railroad freight car travels on a level track at a speed of 4.5 m/s. It collides and...

Q: A particle is moving such that s =t3-6t2+18t + 9, where s is in metres andt is in seconds. The minim...

A: The particle is moving such that: s = t3 - 6t2 + 18t + 9 To find the minimum velocity attained by ...

Q: Draw a FBD for each situation, a) A box was dropped from an airplane in the air with a parachute hit...

Q: In the figure below, determine the point (other than infinity) at which the total electric field is ...

Q: 2: If there are two equipotential surfaces separated by a distance of 25 centimeters as shown. Which...

A: In the figure, the electric field lines are the same, and they point in the same direction. Hence, t...

Q: A capacitor is connected across the terminals of a (1.600x10^2)-V rms, 69-Hz generator. For what cap...

Q: All of the following wires are made of the same material but are of different sizes. Which wire has ...

Q: answer d e j k l

Q: A 7.38-nC charge is located 1.82 m from a 3.86-nC point charge. (a) Find the magnitude of the electr...

A: given data - first charge Q1 = 7.38 nC second charge Q2 = 3...

Q: Arollercoaster cart leaves point A at a speed of 4 m/s, passes through point B on the ground, and re...

Q: A stone is dropped from the upper observation deck of a tower, 900 m above the ground. (Assume g = 9...

Q: Current Current (a) (b) Current Current (c) (d) Copper conductors at the same temperature. Which has...

Q: 1. Identify which central charge has the biggest net force acting on it. 2. Describe the net force o...

Q: O Acose O Asine O Acosp O Avsing O 0 0 0 0 0 0 0

Q: Of the following quantities, the one that is not a scalar in character is select the letter of your ...

A: The problem is based on definition of scalar and vector. To solve the given question we will write d...

Q: A parallel-plate capacitor of capacitance C0 = ε0A0/d0 , is connected to a battery. When the capacit...

A: Given information: The initial capacitance of the capacitor is: C0=ε0A0d0 Later on the plates of the...

Q: A force of 50 N stretches a spring in the figure by 200 mm. (a) What is the spring constant k? (b) W...

A: We use the relations F=kxE=12kx2

Q: Which of the following represents a diagram showing conventional current?

A: The conventional direction is from positive terminal of battery to negative terminal of the battery...

Q: A jet plane lands with a velocity of 100 m s and can accelerate at a maximum rate of −5m/s2 as it co...

A: given data, jet plane lands with a velocity (initially), u = 100m/s retardation(negative accelerat...

Q: In the winter, cold air is brought into homes and is heated. How does the relative humidity of that ...

A: Relative humidity is the measure of amount of water vapor present in the air ( in percentage). It i...

Q: The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum...

Q: Stewart, Justin 3- Energy/ 2 of 4I Activity 2 Task: Conservation of Energy Activity 2 of 5 Which sta...

A: Given The ball starts on the hill from the top and begins to roll downward with no initial energy an...

Q: Part A The figure (Figure 1)shows a wire that is made of two equal- diameter segments with conductiv...

Q: While waiting for her ride, Maria hears the siren of an ambulance approaching her at a speed of 30 m...

Q: Oppositely charged parallel plates are separated by 4.85 mm. A potential difference of 600 V exists ...

Q: What is the potential energy of a 5kg bowling ball that is held 8.9 meters above the ground

A: In this question we have to find the potential energy of the body. Please give positive feedback if ...

Q: 22.A. The law that states the relationship between the incident and refracted rays is called A. Snel...

A: Snells law

Q: A 265-kg load is lifted 18.0 m vertically with an acceleration a = 2m/s by a single cable. 1. Dete...

A: Draw the free-body diagram of the load.

Q: 40 Five identical light bulbs are connected to two power supplies, &1 V, and ɛ2 = 80 V. Each light b...

Q: Changes rapidly with temperature Thermopiles Thermocouple Thermistor O

A: Explanation :- Thermistor :- A thermistor is a type of resistor whose resistance changes rapidly in...

Q: The volume of a gas exiting a delivery device is 0.2 liters at a temperature of 150C. The gas then h...

Q: Cessna Marie throws a ball straight up. Ignoring air resistance, which of the following statements i...

A: Acceleration of the ball is due to acceleration of gravity (g=9.8m/s2) which remains always constant...

Q: Three point charges are located along the x-axis. Point charge q, = +3.5 x 10-6 C at x = 0, point ch...

Q: A molecule has states with the following energies: 0, 1ε, 2ε, 3ε, and 4ε, where ε = 1.0 x 10-20 J. ...

A: Use formula of probability for finite levels and put the value to solve for probability in the groun...

Q: A molecule has states with the following energies: 0, 1ε, 2ε, where ε = 1.0 x 10-20 J. Calculate th...

Q: Problem 17-18. A basketball is shot from an initial height of 2.40m (as shown in figure below) with ...

Q: In the figure below, the coefficient of kinetic friction between the block and inclined plane is 0.2...

A: μk = 0.27θ = 59o

Q: If an object is moving with constant acceleration, what is the shape of its velocity vs. time graph?...

A: Draw the acceleration vesus time graph if the object is moving with constant acceleration.

Q: Will the ball make it over the hill on the right? Why or why not? Imagine a ball on a track where no...

A: In cases like this, the potential energy of the ball will convert to translational plus rotational k...

Q: Calculate the kinetic energy in joules of a 76 kg traveling at 6.28 m/s.

A: Given data : Mass = m Velocity = V To find ...

Q: You have designed and constructed a solenoid to produce a magnetic field equal in magnitude to that ...

Concept explainers

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.

Question

...
ton cart
ne inclined
t of work
18. What is the average power developed by
a motor as it lifts a 400.-kilogram mass at
a constant speed through a vertical distance
of 10.0 meters in 8.0 seconds?
(1) 320 W
(2) 500 W
(3) 4,900 W
(4) 32,000 W
19. Determine the power developed by a man
weighing 6.0 x 102 newtons who climbs a rope
at a constant speed of 2.0 meters per second.
20. Student A lifts a 40.-newton box from the floor
to a height of 0.30 meter in 2.0 seconds. Student
B lifts a 30.-newton box from the floor to a
height of 0.40 meter in 4.0 seconds. Compared
to student A, student B does
(1) less work but develops more power
(2) more work but develops less power
(3) the same work but develops less power
(4) the same work but develops more power
vertically
ne inclined
e would be
(4) 9.8 J
eight to a height
crane does work
21. A 5.0 x 102-newton girl develops 250 watts of
power as she runs up two flights of stairs to a
landing a total of 5.0 meters vertically above her
starting point. Calculate the time required for
the girl to run up the stairs.
x 103 W
X 104 W
t of work that a
0. seconds?
5.0 x 103 J
5.0 × 104 J
22. A motor having a maximum power rating of
8.1 X 104 watts is used to operate an elevator
with a weight of 1.8 × 104 newtons. What is
the maximum weight this motor can lift at an
average speed of 3.0 meters per second?
(1) 6.0 × 103N
(2) 1.8 × 104 N
A watts exerts
3 newtons on
erage speed
(3) 2.4 × 104N
(4) 2.7 × 104N
23. A girl weighing 500. newtons takes 50.0 seconds
to climb a flight of stairs 18 meterr himt
10x 103newton

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

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?
An electron in a television tube is accelerated uniformly from rest to a speed of 8.4107 m/s over a distance of 2.5 cm. What is the power delivered to the electron at the instant that its displacement is 1.0 cm?
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.
Check Your Understanding Fend the forces on the particle in Example 8.6 when kinetic energy is 1.0 J at x=0.
The man of the preceding problem consumes approximately 1.05107J (2500 food calories) of energy per day in maintaining a constant weight. What is the average power he produces over a day? Compare this with his power production when he runs up the stairs.
Using energy considerations and assuming negligible air resistance, show that a rock thrown from a bridge 20.0 m above water with an initial speed of 15.0 m/s strikes the water with a speed of 24.8 m/s independent of the direction tin own. (Hint. show that (Ki+Ui=Kf+Uf)
Give an example of something we think of as work in everyday circumstances that is not work in the scientific sense. Is energy transferred or changed in form in your example? If so, explain how this is accomplished without doing work.
Work How much work does a supermarket checkout attendant do on a can of sip he pushes 0.600 m horizontally with a force of 5.00 N?
Does the work done in lifting an object depend on how fast it is lifted? Does the power expended depend on how fast it is lifted?
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance?
A particle of mass 2.0 kg moves under the influence of the force F(x)=(5x2=7x)N . Suppose a frictional force also acts on the particle. If the particle’s speed when it starts at x=4.0 m is 0.0 m/s and when it arrives at x=4.0 m is 9.0 m/s, how much work is done on it by the frictional force between x=4.0 m and x=4.0 m?
Two forces act to double the speed of a particle, initially moving with kinetic energy of 1 J. One of the forces does 4 J of work. How much work does the other force do?