Inquiry into Physics
8th Edition
ISBN: 9781337515863
Author: Ostdiek
Publisher: Cengage
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Chapter 3, Problem 28Q
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What can you conclude, if two cranes are lifting identical steel beams at the same time? One crane is putting out twice as much power as the other.
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Hi! This was answered here before but it was wrong, I was told that I should set-up an equation for mass M and mass m and then combine them to get the velocity (so there must be a solution for letter B before I can solve letter A). Also, the velocity is between 9 to 9.5 m/s. The work referred to in letter A is the work done on mass M by tension. Help please, thank you!
A chain 67 meters long whose mass is 28 kilograms is hanging over the edge of a tall building and does not touch the ground. How much work is required to lift the top 5 meters of the chain to the top of the building? Use that the acceleration due to gravity is 9.8 meters per second squared. Your answer must include the correct units.Work =
A 65.0-kg file cabinet of is sliding down a rough ramp for a distance of 5.00 m as shown. The friction force on the box is 75.0 N. During this process, what is the work
done on the cabinet by its own weight, in Joule? Use g = 10.0 m/s². (Hint: What is the angle between the weight force and the displacement?)
Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit
is needed in your answer, it is already given in the question statement.
5.0 m
841
841
15.0°
Selected Answer:
Correct Answer:
Answer range +/- 1 (840 - 842)
Chapter 3 Solutions
Inquiry into Physics
Ch. 3 - Distinguish between what a physicist and a...Ch. 3 - If the population in a certain country was...Ch. 3 - Describe the basic features of the “lighthouse”...Ch. 3 - Prob. 2AACh. 3 - Prob. 1PIPCh. 3 - Prob. 1MIOCh. 3 - Repeat Exercise I for Section 3.2 on linear...Ch. 3 - (Indicates a review question, which means it...Ch. 3 - (Indicates a review question, which means it...Ch. 3 - (Indicates a review question, which means it...
Ch. 3 - (Indicates a review question, which means it...Ch. 3 - (Indicates a review question, which means it...Ch. 3 - (Indicates a review question, which means it...Ch. 3 - (Indicates a review question, which means it...Ch. 3 - Prob. 8QCh. 3 - (Indicates a review question, which means it...Ch. 3 - Prob. 10QCh. 3 - (Indicates a review question, which means it...Ch. 3 - Prob. 12QCh. 3 - (Indicates a review question, which means it...Ch. 3 - (Indicates a review question, which means it...Ch. 3 - (Indicates a review question, which means it...Ch. 3 - Prob. 16QCh. 3 - Prob. 17QCh. 3 - (Indicates a review question, which means it...Ch. 3 - (Indicates a review question, which means it...Ch. 3 - (Indicates a review question, which means it...Ch. 3 - Prob. 21QCh. 3 - (Indicates a review question, which means it...Ch. 3 - (Indicates a review question, which means it...Ch. 3 - (Indicates a review question, which means it...Ch. 3 - Prob. 25QCh. 3 - (Indicates a review question, which means it...Ch. 3 - (Indicates a review question, which means it...Ch. 3 - Prob. 28QCh. 3 - (Indicates a review question, which means it...Ch. 3 - Prob. 30QCh. 3 - Prob. 31QCh. 3 - Prob. 32QCh. 3 - (Indicates a review question, which means it...Ch. 3 - Prob. 34QCh. 3 - (¦ Indicates a review question, which means it...Ch. 3 - A sprinter with a mass of 65 kg reaches a speed of...Ch. 3 - Which has the larger linear momentum: a 2,000-kg...Ch. 3 - In Section 2.4, we computed the force needed to...Ch. 3 - A runner with a mass of 80 kg accelerates from 0...Ch. 3 - In Section 1.4, we considered the collision of a...Ch. 3 - A basketball with a mass of 0.62 kg falls...Ch. 3 - A pitcher throws a 0.5-kg ball of clay at a 6-kg...Ch. 3 - A 3,000-kg truck runs into the rear of a 1,000-kg...Ch. 3 - A 50-kg boy on roller skates moves with a speed of...Ch. 3 - . Two persons on ice skates stand face to face and...Ch. 3 - . A loaded gun is dropped on a frozen lake. The...Ch. 3 - . A running back with a mass of 80 kg and a speed...Ch. 3 - . A motorist runs out of gas on a level road 200 m...Ch. 3 - . In Figure 3.10, the rock weighs 100 lb and is...Ch. 3 - . A weight lifter raises a 100-kg barbell to a...Ch. 3 - Prob. 16PCh. 3 - . A personal watercraft and rider have a combined...Ch. 3 - As it orbits Earth, the 11,000-kg Hubble Space...Ch. 3 - . The kinetic energy of a motorcycle and rider is...Ch. 3 - . In compressing the spring in a toy dart gun,...Ch. 3 - . An archer using a simple bow exerts a force of...Ch. 3 - A worker at the top of a 629-m-tall television...Ch. 3 - . A 25-kg child uses a pogo stick to bounce up and...Ch. 3 - . A student drops a water balloon out of a dorm...Ch. 3 - . A child on a swing has a speed of 7.7 m/s at the...Ch. 3 - . The cliff divers at Acapulco, Mexico, jump off a...Ch. 3 - . At NASA's Zero Gravity Research Facility in...Ch. 3 - . The fastest that a human has run is about 12...Ch. 3 - . A bicycle and rider going 10 m/s approach a...Ch. 3 - . In January 2003, an 18-year-old student gained a...Ch. 3 - The ceiling of an arena is 20 m above the floor....Ch. 3 - . Compute how much kinetic energy was “lost” in...Ch. 3 - Compute how much kinetic energy was “lost” in the...Ch. 3 - . A 1,000-W motor powers a hoist used to lift cars...Ch. 3 - . How long does it take a worker producing 200 W...Ch. 3 - . An elevator is able to raise 1,000 kg to a...Ch. 3 - . A particular hydraulic pile driver uses a ram...Ch. 3 - . A compact car can climb a hill in 10 s. The top...Ch. 3 - . In the annual Empire State Building race,...Ch. 3 - . It takes 100 minutes for a middle-aged physics...Ch. 3 - . Two small 0.25-kg masses are attached to...Ch. 3 - Rank the following three collisions in terms of...Ch. 3 - A bullet with a mass of 0.01 kg is tired...Ch. 3 - In a head-on, inelastic collision, a 4,000-kg...Ch. 3 - Prob. 4CCh. 3 - Prob. 5CCh. 3 - The "shot" used in the shot-put event is a metal...Ch. 3 - Prob. 7CCh. 3 - Prob. 8CCh. 3 - A series of five 0.1-kg spheres are arrayed along...
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- A mountain climber is about to haul up a 90-m length of hanging rope. How much work will it take if the rope weighs 0.65 N/m? Set up the integral that gives the work required, in joules. W= dx The amount of work required is (Type an integer or a decimal.)arrow_forwardA motorcycle can go from 0-60 mph in 3.5 sec. The mass of the motorcycle is 450 kg. (a) What is the kinetic energy of the bike when it is going 60 mph (in joules)? (b) What is the power of the engine to get from 0 to 60 mph in 3.5 sec? (c) Convert that power to horsepowerarrow_forwardA 50 kg bicyclist on a 10 kg bicycle speeds up from 5.0 m/s to 10 m/s. (a) What was the total kinetic energy before accelerating? (b) What was the total kinetic energy after accelerating? (c) How much work was done to increase the kinetic energy of the bicyclist?arrow_forward
- Part A: If you lift a 10 kg object that weighs 10 N (22lbs.) from the floor and place it on a table 1.5 m high, how much work did you do and how much potential energy did you give the object? Assume no friction. Part B: You apply 10N force to an object for 10m, how much work did you do and how much kinetic energy did you give the object? Assume no friction.arrow_forwardMatthew pushes a box of toys along a 5 m long ramp that is inclined 3 m high. The force exerted is parallel to the ground, not the ramp. The box has a total mass of 20 kg and the coefficient friction between the box and the ramp is 0.33. How much work is done by friction?arrow_forwardConsider the energy we use everyday in routine tasks, where that energy comes from, and where it goes. When you climb stairs you overcome the force of gravity to raise yourself to some height. It does not matter what the slope of the stairs are; the work done is against gravity which is always vertical so only the height counts. Take a typical human mass of 65 kg (roughly 143 lb of gravitational pull or weight) and a stairway up 2 stories which is about 6 meters. If you drop a coin from the top of the stairs down to the bottom of the stairwell, what is the velocity of the coin when it reaches the floor? After you walk back down the stairs to retrieve your coin, how much work did you do to descend?arrow_forward
- A 50 kg mass that weighs 490 Newtons is pushed up a 20m lone ramp that is 2m high. (h). The force required to push the block up the ramp is 49 Newtons. Assume the ramp is frictionless. Don’t confuse mass with weight. Weight is a force and is equal to mg. How much work is done in sliding the block from the bottom of the ramp to the top? Show calculations. Work=Force(f) *Displacement (d) =49*20 =980 J 2. How much work would be done in lifting the mass straight up 2.0 m(h)? Show calculations. See (Videos above for help). If the block slides down from the top of the ramp to the bottom, how much kinetic energy will the block have at the bottom of the ramp? Assume the ramp is frictionless. Calculate the velocity of the block when it reaches the bottom of the ramp. (mgh=1/2mv2) If the block is dropped from the top of the ramp and falls straight down to the ground, how much kinetic energy will it have at the moment it strikes the ground? Note: many students will answer…arrow_forwardAt what speed does a 1200 kg compact car have the same kinetic energy as a 17000 kg truck going 23 km/h? Express your answer in kilometers per hourarrow_forwardFractured Physics. People often call their electric bill a power bill, yet the quantity on which the bill is based is expressed in kilowatthours. What are people really being billed for?arrow_forward
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