Betty (65 kg) and Zoe (57 kg) are fishing on opposite sides of a 4.0 m long raft (20 kg) when they decide to switch spots.   How far did the raft move?

Q: A hunter has a rifle that can fire 50-g bullets with a speed of 900 m/s. A 90 kg tiger springs at…

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Q: A 45 kg boy jumps on a stationary cart with luggage. The velocity of the boy when he jumps is 5.3…

A: Using the conservation of momentum, m1u1+m2u2=m1+m2vm1u1=m1+m2v                  u2=0v=m1u1m1+m2

Q: A father (mF = 90 kg) and his daughter (mD= 42 kg) stand on a flat frozen lake of negligible…

A: Given data: Mass of father (mf ) = 90 kg Mass of daughter (md ) = 42 kg In the given problem,  there…

Q: A large cargo truck loses traction on a wet road while moving at 30 m/s to the west as it approaches…

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Q: Juliet drops a 0.25 kg grapefruit from the 3rd-floor palcony (10 m high), into Romeo's waiting hands…

A: Given Mass of grapefruit is m= 0.25 kg Acceleration due to gravity is g= 9.80 m/s2.

Q: While walking through an orchard on a windy day, you see a 255 g apple hanging from a branch 10. m…

A: Mass of apple = 255 g  = 0.255 Kg  Initial height of apple = 10 m  Final height of apple where it is…

Q: The driver of a car (1100 kg) traveling at 30 m/s on dry concrete sees a deer in the distance and…

A: The mass of the car m=1100 kg. The velocity of the car v=30 m/s. Standard values: Coefficient of…

Q: An overnight rainstorm has caused a major roadblock. Three massive rocks of mass m1 = 528 kg, m2 =…

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Q: A canoe is designed to have very little drag when it moves along its length. Riley, mass 62 kg ,…

A: A canoe is designed to have very little drag when it moves along its length.Riley, mass  m1= 62 kg ,…

Q: 4. A 58.5-kg astronaut is doing a repair in space on the orbiting space station. She is at rest…

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Q: A canoe is designed to have very little drag when it moves along its length. Riley, mass 52 kg, sits…

A: Given data: The mass is: m2 = 52 kg The mass of the canoe is: m1 = 21 kg The velocity of canoe…

Q: A boy kicked a ball that has a mass of 65.0 g. The boy's foot was in contact with the ball for only…

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Q: At the center of a 50-mm-diameter circular ice rink, a 78 kg skater traveling north at 2.5 m/s…

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Q: 4. A dog of mass Md is standing on a raft so that he is a distance Xdgi = L from the shore. He walks…

A: Given :    m1 = Md                m2 = Mb                Xdgi = L               ∆xds = d m1 → mass…

Q: A hungry 173 kg lion running northward at 84.5 km/hr attacks and holds onto a 33.5 kg Thomson's…

A: Given:-  The mass of the lion mL = 173 kg  in running northward vL= 84.5 km/h   Thomson's gazelle…

Q: (a) How far (in m) does the 85.0 kg boat move toward the shore it is facing? 0.71 m (b) What If? If…

A: a) The center of mass of the boat, Romeo and Juliet system can be given as, Here, m and x represent…

Q: A delivery person carries a stack of three boxes labeled 1, 2, and 3. Box 3 is on the bottom of the…

A: Given:            Mass of the boxes are m1=1.5 kg;  m2=2.5 kg;    m3=8 kg            Acceleration of…

Q: 20. During a stormy season, winds can move horizontally at 30 m/s. If air strikes a person at the…

A: Given: The speed of the wind is 30 m/s. The strike rate is 40 kg/s.m2. The height of the person is…

Q: A volleyball weighing 0.38 kg approaches Zina with a velocity of 3.8 m / s. Zina hits it and gives…

A: Recall Favg=∆P/∆t

Q: In a dramatic rescue mission, Dr. Porter was up on a 15-meter-high cliffside where she saw a box of…

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Q: A 40 gram bullet is shot from a gun and accelerates from rest to a velocity of 550 m/s in 2…

A: To find the average force Given, mass of bullet = 40 g = 0.04 kg Initial velocity Vi = 0 m/s Final…

Q: A 67.0 kg person is riding a bike on a level horizontal street. Together, the bike and person have a…

A: Mass of the person (m1) =67 kgCombined mass  of  person  and  bike                     is 74.6 kg .…

Q: Two people (75 kg and 50 kg) skate together in a straight line at a speed of 5 m/sec. They push each…

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Q: In the figure, two long barges are moving in the same direction in still water, one with a speed of…

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Q: Lineman A has a mass of 100 kg and traveling at 4 m/s when he collides with Lineman B who has a mass…

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Q: A 1.2 kg ball is falling in the -y direction at a speed of 25 m/s. The ball strikes the floor and…

A: The ball's mass is, m=1.2 kg The change in the velocity of a ball is, Δv=10--25 m/s=35 m/s The time…

Q: A batter hits a 0.334 kg basball that was approaching him at 23.4 m/s and, as a result, the ball…

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Q: Two ice skaters, with masses of 75 kg and 55 kg, stand facing each other on a 15-m-wide frozen…

A: Given data Initially, both the skaters are at rest

Q: Romeo (75.0 kg) entertains Juliet (47.0 kg) by playing his guitar from the rear of their boat at…

A: Let's take ;            mR=75 kg (mass of Romeo)mJ=47 kg (mass of Juliet)mB=85 kg (mass of boat)…

Q: A 30-gram bullet initially travelling at 500 m/s penetrates 12 cm into a wooden block. What average…

A: Given-           mass (m) = 30g           velocity(v) = 500 m/s            penetration (D) = 12 cm

Q: Part C What is the magnitude of the acceleration? Express your answer in meters per second squared.…

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Q: A 65.0 kg  diver, dives horizontally off a 375 kg raft initially at rest. If the diver's speed…

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Q: An 19.0-kg fish moving horizontally to the right at 3.11 m/s swallows a 2.2 kg fish that is swimming…

A: The speed of large fish immediately after its lunch is  V = 2.02 m/s

Q: A 63-kg canoeist stands in the middle of her 22-kg canoe.The canoe is 3.0 m long, and the end that…

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Q: A confused 53.kg bowler on ice skates is coasting forwards with speed 20 m/s when he catches a…

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Q: Bernadetta has a mass of 58 kg. She is riding her skateboard east at 6 m/s. She collides with…

A: given: mB=58 kguB =6 m/s ( towards East)us= 3 m/s (towards West)V = 0.3 m/s (towards west)

Q: kg) entertains Julie kg) by playing his guitar from their boat at rest in still water, 2.70 m away…

A: Find the center of mass of the system before Juliet moves to the end of the boat.…

Q: What is the ball's kinetic energy at the start of its motion?

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Q: A 45 g golf ball leaves the tee with a speed of 43 m/s after a golf club strikes it.  Determine the…

A: Given that, The mass of the ball is m=45 g The ball leaves the tee with a speed of 43 m/s

Q: You are about to do a back squat. You place a 20 kg plate on one end of the bar and mistakenly place…

A: mass of first plate (m1) = 20 kg mass of second plate (m2) = 40 kg mass of rod (M) = 20 kg position…

Q: Imagine you are ice skating with your best friend. Both of you are at rest when you shove him/her…

A: To solve the given question we will use conservation of momentum.