(a) How many seconds does it take a 20.0 hp motor to lift a 2200.0 lb elevator a distance of 30.0 ft?(b) What was the average velocity of the elevator?ft/sA ball is dropped from 7.2 ft above the ground. Using energy considerations only, find the velocity of the ball just as it hits the ground.Assume that alr-drag is negligible in this case.ft/sV=What is the velocity of a 3350 kg car if its kinetic energy is 255.0 kJ?m/s

Answered: (a) How many seconds does it take a…

(a) How many seconds does it take a 20.0 hp motor to lift a 2200.0 lb elevator a distance of 30.0 ft? (b) What was the average velocity of the elevator? ft/s

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Related questions

Q: What is the maximum velocity at which a 25 W motor can lift an 8.5 kg object upward

A: Given that:- P=25 Wm=8.5 kgg=9.8 m/s2V=? Since, P=mgV

Q: An elevator must lift 15,000 kg a distance of 125 m at a velocity of 2.5 m/s. What is the average…

A: Mass, m = 15000 kg Distance, d = 125 m Velocity, v = 2.5 m/s Acceleration due to gravity, g = 9.81…

Q: How much time does it take to lift 450 kg

A: Given; Engine develops power of = 35 kW Time required does it take to lift 450 kg to a height ,h=50…

Q: How much power is developed by an airplane that cruises at 300 m/s when the thrust of its engine is…

Q: What is the power of the force required to move a 4500 kg elevator cab with a load of 1800 kg upward…

A: Given that,Mass of the elevator : m = 4500 (kg)Mass of load : M = 1800 (kg)The speed : v = 3.80…

Q: A 5kg medicine ball is thrown upward at 8 m/s. When it is caught, a force is applied over a distance…

A: Given Data: The mass of the ball is: m=5 kg The velocity of the ball is: v=8 m/s The distance to…

Q: A 3.0-hp motor pulls a mini elevator up at constant speed. The elevator has a mass of 12.0 kg and…

A: Given, P = 3 hp m = 12 kg t = 7 s We know, Power = Work done/time = Force x Velocity and h = ut +…

Q: Coal is being lifted a vertical distance of 36m from a mine by an engine that supplies 562W of…

A: GivenCoal lifted to a distance = s = 36 m Power = P = 562 W We have to calculate the rate at which…

Q: If a water motor fills 25 kg of water in a pool of 60 m in 5 minutes, what is the power of the…

A: The pump fills a pool of height h=60 m with water of mass m=25 kg in t=5 min=300 s.The potential…

Q: A rickshaw puller pulls the rickshaw by applying a force of 120 N. If the rickaw moves with constant…

A: Introduction : In this question we are provided it value of velocity and force . With these data…

Q: A 1,000-W motor powers a hoist used to lift cars at a service station. (a) How much time would it…

A: Power is defined as the work done per unit time. P=Worktime When a mass is raised to some height, we…

Q: 30.0 m

A: Given:mass, m = 75 kg

Q: Steve has done a work of 3270 Joules on the stalled car as he pushes it a distance of 18m. The car…

Q: Adam drove a bike 1260 m with an average speed of 115m/s. Suppose he applied the brakes to reduce…

A: According to the work-energy theorem, the work done by the brakes will be equal to the change in…

Q: A Train weighs 25 MN. The train resistance is 100kN if 7500 hp are exerted to pull the train in a…

A: Weight of the train W=25 MNresistance f=100 kNPower P=7500 hpslope =5%=5/100slope=…

Q: A top fuel dragster with a mass of 600.0 kg starts from rest and completes a quarter mile (402 m)…

A: Given data- A top fuel dragster with a mass m=600.0 kg initial velocity Vi=0 m/s (rest) final…

Q: you psush a file acbinet up a rough ramp titled at 10 degreee with horizontak. The file cabinet has…

Q: Calculate the kinetic energies (in J) of the following. a 2,004.0 kg automobile moving at 140.0…

Q: Problem 6. Work-Energy Theorem: The kinetic friction force tha a horizontal surface exerts on a…

Q: Engine power is sometimes expressed in terms of "horsepower." One horsepower was defined by James…

Q: Estimate the kinetic energy (in GJ) of a 97,500 metric ton aircraft carrier moving at a speed of at…

A: According to question we need to find kinetic energy.

Q: A runner with mass 140 kg run with speed 40 km/h on a wet road with a friction. Find the friction…

A: Given: Mass M = 140 kg Speed v = 40Km/h

Q: A top fuel dragster with a mass of 600.0 kg starts from rest and completes a quarter mile (402 m)…

A: Given: mass of top fuel dragster, m = 600 kg Initial speed, u = 0 (starting from the rest) Final…

Q: An Amazon warehouse forklift is fitted with a 2.5 HP motor to lift pallets to the highest shelf…

A: Given: Power of motor, P=2.5 HP Height from ground to lift pallet ., h=12 m Mass of pallet, m=1.2…

Q: A 1,000-W motor powers a hoist used to lift cars at a service station. (a) How much time would it…

Q: Calculate the power output in watts and horsepower of a shot-putter who takes 1.10 s to accelerate…

A: Total change in energy of the shot = Change in kinetic energy + Change in potential energy 1 hp =…

Q: A motor boat moves at a steady speed of 7 m/s. Water - resistance acting on it is 5000 N. Calculate…

A: Given data : Speed of the boat = V Force = F To find :…

Q: a) A rocket-powered car weighs 1200 kg. Its rocket engine loses hrust as timet increases, so that…

A: in a given question thrust force is a function of time F=500√t mass of rocket car is =1200 kg we…

Q: A man of mass 60.0 kg takes 4 seconds to run up a 4-m high stairs. Which of the following gives the…

Q: What is the power of the force required to move a 4500 kg elevator cab with a load of 1800 kg upward…

Q: A student is being push on a swing. What is the maximum height, hf, that the student of weight, W…

A: The maximum height that the student can reach on the swing will depend on the initial height, hi,…

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 weight lifter lifts a 350-N set of weights from ground level to a position over his head, a…

A: Given : F = 350 N d = 2.00 m

Q: The engine of a motorboat delivers 40 hp to the propeller while the boat is moving at 10m/s. What…

A: Power delivered is P = 40 hp 1 hp = 745.7 Watts => P = 40×745.7 Watts => P = 29828 Watts…

Q: A transport truck driving at a constant speed of 82.0 km/hr on a flat stretch of highway must…

Q: A farmer pulls a 0.6 kg bucket full of water from a well, only slightly accelerating it from 0.4 m/s…

Q: A 70.2 kg box slides along a flat surface until it comes to rest. Friction did -849.3 J of work on…

A: Given Mass of box m = 70.2 kg Final velocity V2 = 0 (since comes to…

Q: A 70.0 kg skier with an initial speed of 14.0 m/s coasts up a 2.50 m high rise as shown in the…

A: The problem is regarding the conservation of energy. The initial energy of the person will overcome…

Q: John is moving the drawer from one place to another, instead of pushing he used a rope to pull it…

Question

(a) How many seconds does it take a 20.0 hp motor to lift a 2200.0 lb elevator a distance of 30.0 ft?
(b) What was the average velocity of the elevator?
ft/s
A ball is dropped from 7.2 ft above the ground. Using energy considerations only, find the velocity of the ball just as it hits the ground.
Assume that alr-drag is negligible in this case.
ft/s
V=
What is the velocity of a 3350 kg car if its kinetic energy is 255.0 kJ?
m/s

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: Given:

VIEW

Step 2: a) Calculation for the value of seconds:

VIEW

Step 3: b) Calculation for the average velocity of the elevator:

VIEW

Solution

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 4 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

An elevator with total mass of 1,600 kg is moving up ward with constant acceleration. A friction in the system resists the motion with force of 4,000 N constantly. Find how much power is required to lift the elevator at a constant acceleration of 1.0 m/s2 at the instant the speed of the elevator is v = 3 m/s?
A sled is initially given a shove up a frictionless 26.0 incline. It reaches a maximum vertical height 1.50 m higher than where it started at the bottom. a) What was its initial speed?
Cathy just rebuilt the engine in her car (mcar = 1,200 kg) and the rebuilt engine can supply 72,900 W of power, if all the power from the engine goes into moving the car, how much time would it take Cathy’s car to go from 0 to 27 m/s on a flat, horizontal road?
A 1.50 ✕ 103-kg car starts from rest and accelerates uniformly to 19.9 m/s in 12.7 s. Assume that air resistance remains constant at 400 N during this time. (a) Find the average power developed by the engine. ___hp
How much power is developed by an airplane that cruises at 300m/s when the thrust of its engine is 1.50×10⁵N?
A motor in an elevator can output 2801 watts. How high can this motor lift a 4988.9 N elevator in 59 seconds?
(a) A stuntman with a mass of 81.5 kg swings across a pool of water from a rope that is 11.0 m. At the bottom of the swing the stuntman's speed is 7.90 m/s. The rope's breaking strength is 1,000 N. Will the stuntman make it across the pool without falling in? O Yes O No (b) What If? What is the maximum speed (in m/s) that the stuntman can have at the bottom of the swing on this vine to safely swing across the river? m/s
A 62.5 kg box slides along a flat surface until it comes to rest. Friction did -802.5 J of work on the box. How fast (in m/s) was it going at the start?
AE = AK + A PE = 0 if conservative forces are the only forces that do acceleration on the system. work on the system. O kinetic energy on the system.
(1 hp = 746 watts) A 7hp motor pulls a cable which lifts a crate with a constant speed of 3m/s. What is the maximum load that the motor can lift at this speed? Select one 356 45 89 178
The engine of an automobile develops a power of 20 hp when the automobile is moving at 50km/h. (A)what is the resisting force acting on the automobile, if the resisting force is proportional to velocity? (b)what horsepower will drive the car at 25km/h