Physics Physics Practice Problems Solutions Library

# Relative Motion Solutions Library

Access 55 Relative Motion video and text solutions to help you complete your homework.

### Browse Solutions

55 solutions

Relative Motion

#### Q. A swimmer wants to cross a river, from point A to point B, as shown in the figure. The distance d1 (from A to C) is 200 m, the distance d2 (from C ...

Solved • Jul 16, 2020

Relative Motion

#### Q. An airplane is flying in a jet stream that is blowing at 46 m/s in a direction 20° south of east. The plane is moving at 45° South of West relative...

Solved • Jul 16, 2020

Relative Motion

#### Q. 1. Your friend travels by you in a spaceship at 90% the speed of light. Which of the following is not true?A. You will see time running more slowly...

Solved • May 21, 2020

Relative Motion

#### Q. A swimmer wants to cross a river, from point A to point B, as shown in the figure. The distance (from A to C) is 200 m, the distance (from C to B) ...

Solved • May 21, 2020

Relative Motion

#### Q. If you toss a coin straight upward while in a train moving at constant velocity, the coin will land A) as if you were at rest. B) in front of you. ...

Solved • May 18, 2020

Relative Motion

#### Q. If two points are in a common reference frame, thena) They are not in motion relative to each other.b) They are not accelerating relative to each o...

Solved • May 1, 2020

Relative Motion

#### Q. What is the resultant velocity vector when you add your swimming velocity and the velocity of a river current? Give the x and y components in meter...

Solved • Apr 9, 2020

Relative Motion

#### Q. A canoe has a velocity of 0.400 m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.460 m/s east relative to the eart...

Solved • Mar 25, 2020

Relative Motion

#### Q. A boat can travel 2.30 m/s in still water.If the boat points its prow directly across a stream whose current is 1.60 m/s , what is the magnitude o...

Solved • Oct 29, 2018

Relative Motion

#### Q. A boat is traveling where there is a current of 0.20 m/s east. To avoid some offshore rocks, the boat must clear a buoy that is NNE (22.5) and 2.8...

Solved • Oct 29, 2018

Relative Motion

#### Q. A light plane is headed due south with a speed relative to still air of 175  km/h. After 1.00 h, the pilot notices that they have covered only 145 ...

Solved • Oct 29, 2018

Relative Motion

#### Q. The speed of a boat in still water is v. The boat is to make a round trip in a river whose current travels at speed exttip{u}{u}.Derive a formula ...

Solved • Oct 29, 2018

Relative Motion

#### Q. Two cars approach a street corner at right angles to each other (as show in the figure). Car 1 travels at 35 km/h and car 2 at 45 km/h. Assume that...

Solved • Oct 29, 2018

Relative Motion

#### Q. A swimmer is capable of swimming 0.75 m/s in still water.If she aims her body directly across a 60 m -wide river whose current is 0.55 m/s , how f...

Solved • Oct 29, 2018

Relative Motion

#### Q. A swimmer is capable of swimming 0.80 m/s in still water.(a) At what upstream angle must the swimmer aim, if she is to arrive at a point directly a...

Solved • Oct 29, 2018

Relative Motion

#### Q. A motorboat whose speed in still water is 4.10 m/s must aim upstream at an angle of 18.6 o (with respect to a line perpendicular to the shore) in...

Solved • Oct 29, 2018

Relative Motion

#### Q. A boat, whose speed in still water is 2.70 m/s, must cross a 280 m-wide river and arrive at a point 120 m upstream from where it starts. To do so, ...

Solved • Oct 29, 2018

Relative Motion

#### Q. An airplane, whose air speed is 560 km/h, is supposed to fly in a straight path 36.0° N of E. But a steady 82 km/h wind is blowing from the north. ...

Solved • Oct 29, 2018

Relative Motion

#### Q. Huck Finn walks at a speed of 0.70 m/s across his raft (that is, he walks perpendicular to the rafts motion relative to the shore). The raft is tra...

Solved • Oct 29, 2018

Relative Motion

#### Q. A child, who is 45 m from the bank of a river, is being carried helplessly downstream by the rivers swift current of 1.0 m/s. As the child passes a...

Solved • Oct 29, 2018

Relative Motion

#### Q. A passenger on a boat moving at 1.70 m/s on a still lake walks up a flight of stairs at a speed of 0.60 m/s,as shown in the figure . The stairs are...

Solved • Oct 29, 2018

Relative Motion

#### Q. A person in the passenger basket of a hot-air balloon throws a ball horizontally outward from the basket with speed 10.0 m/s .What initial velocity...

Solved • Oct 29, 2018

Relative Motion

#### Q. An airplane is heading due south at a speed of 560 km/h . If a wind begins blowing from the southwest at a speed of 80.0 km/h (average).Calculate ...

Solved • Oct 29, 2018

Relative Motion

#### Q. An airplane is heading due south at a speed of 580 km/h. If a wind begins blowing from the southwest at a speed of 90.0 km/h (average), in what dir...

Solved • Oct 29, 2018

Relative Motion

#### Q. Two rowers, who can row at the same speed in still water, set off across a river at the same time. One heads straight across and is pulled downstre...

Solved • Oct 29, 2018

Relative Motion

#### Q. A "moving sidewalk" in an airport terminal building moves at a speed of 1.3  m/s and is of length 36.0 m . A woman steps on at one end and walks at...

Solved • Oct 29, 2018

Relative Motion

#### Q. A canoe has a velocity of 0.43 m/s southeast relative to the earth. The canoe is on a river that is flowing 0.53 m/s east relative to the earth.Y...

Solved • Oct 29, 2018

Relative Motion

#### Q. A river flows due south with a speed of 2.1 m/s . You steer a motorboat across the river; your velocity relative to the water is 4.1 m/s ...

Solved • Oct 29, 2018

Relative Motion

#### Q. Canada geese migrate essentially along a north-south direction for well over a thousand kilometers in some cases, traveling at speeds up to about 1...

Solved • Oct 29, 2018

Relative Motion

#### Q. A 400.0-m-wide river flows from west to east at 30.0 m/min. Your boat moves at 110 m/min relative to the water no matter which direction you point...

Solved • Oct 29, 2018

Relative Motion

#### Q. You are a member of a geological team in Central Africa. Your team comes upon a wide river that is flowing east. You must determine the width of th...

Solved • Oct 29, 2018

Relative Motion

#### Q. In a World Cup soccer match, Juan is running due north toward the goal with a speed of 7.60 m/s relative to the ground. A teammate passes the ball...

Solved • Oct 29, 2018

Relative Motion

#### Q. Two soccer players, Mia and Alice, are running as Alice passes the ball to Mia. Mia is running due north with a speed of 6.10 m/s . The velocity of...

Solved • Oct 29, 2018

Relative Motion

#### Q. An airplane pilot sets a compass course due west and maintains an airspeed of 218 km/h . After flying for a time of 0.500 h , she finds herself ove...

Solved • Oct 29, 2018

Relative Motion

#### Q. A river flows due south with a speed of 2.0 m/s. A man steers a motorboat across the river. The river is 800 m wide.In which direction should the m...

Solved • Oct 29, 2018

Relative Motion

#### Q. An airplane pilot wishes to fly due west. A wind of 82.0 km/h is blowing toward the south.If the airspeed of the plane (its speed in still air) is...

Solved • Oct 29, 2018

Relative Motion

#### Q. Two piers, A and B, are located on a river: B is 1500 m downstream from A. Two friends must make round trips from pier A to pier B and return. One ...

Solved • Oct 29, 2018

Relative Motion

#### Q. The nose of an ultralight plane is pointed south, and its airspeed indicator shows 36 m/s . The plane is in a 16 m/s wind blowing toward the south...

Solved • Oct 29, 2018

Relative Motion

#### Q. Zack is driving past his house in . He wants to toss his physics book out the window and have it land in his driveway.If he lets go of the book...

Solved • Oct 29, 2018

Relative Motion

#### Q. In , Yvette and Zack are driving down the freeway side by side with their windows down. Zack wants to toss his physics book out the window and ...

Solved • Oct 29, 2018

Relative Motion

#### Q. A child in danger of drowning in a river is being carried down-stream by a current that flows uniformly with a speed of 2.20 m/s . The child is 400...

Solved • Oct 29, 2018

Relative Motion

#### Q. Ships A and B leave port together. For the next two hours, ship A travels at 20 mph in a direction 30° west of north while ship B travels 20° east ...

Solved • Oct 29, 2018

Relative Motion

#### Q. A kayaker needs to paddle north across a 100-m-wide harbor. The tide is going out, creating a tidal current that flows to the east at 2.0 m/s. The ...

Solved • Oct 29, 2018

Relative Motion

#### Q. While driving north at 25 m/s during a rainstorm you notice that the rain makes an angle of 38° with the vertical. While driving back home moments ...

Solved • Oct 29, 2018

Relative Motion

#### Q. Mary needs to row her boat across a 160 m-wide river that is flowing to the east at a speed of 1.3 m/s. Mary can row with a speed of 3.1 m/s. If Ma...

Solved • Oct 29, 2018

Relative Motion

#### Q. A flock of ducks is trying to migrate south for the winter, but they keep being blown off course by a wind blowing from the west at 6.0 m/s . A...

Solved • Oct 29, 2018

Relative Motion

#### Q. The pilot of an airplane notes that the compass indicates a heading due west. The airplane's speed relative to the air is 150 km/h. The air is movi...

Solved • Oct 29, 2018

Relative Motion

#### Q. An airplane maintains a speed of 630 km/h relative to the air it is flying through as it makes a trip to a city 750 km away to the north. (a) What ...

Solved • Oct 29, 2018

Relative Motion

#### Q. Lisa in her Lamborghini accelerates at the rate of (3.00i - 2.00j) m/s  2, while Jill in her Jaguar accelerates at (1.00i + 3.00j) m/s2. They both ...

Solved • Oct 29, 2018

Relative Motion

#### Q. Towns A and B in Figure P4.64 are 80.0 km apart. A couple arranges to drive from town A and meet a couple driving from town B at the lake L. The tw...

Solved • Oct 29, 2018

Relative Motion

#### Q. A jet airliner moving initially at 300 mi/h to the east suddenly enters a region where the wind is blowing at 100 mi/h toward the direction 30.0° n...

Solved • Oct 29, 2018

Relative Motion

#### Q. A river runs downhill with speed v R. A boat crosses the river with speed v B (both with respect to the river), making an angle α uphill perpendicu...

Solved • May 29, 2017

Relative Motion

#### Q. A river lies in the east - west direction. The current in the river has a velocity relative to the ground of 3 mi/hr toward the east. A boat has a ...

Solved • May 29, 2017

Relative Motion

#### Q. A river lies in the east - west direction. The current in the river has a velocity relative to the ground of 3 mi/hr toward the east. A boat has a ...

Solved • May 29, 2017

Relative Motion

#### Q. A boat moves through the water of a river at 15.8 m/s relative to the water, regardless of the boat’s direction. If the current is flowing at 13.2 ...

Solved • May 24, 2017