Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
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Chapter 3, Problem 6P
To determine
To Estimate:The aircraft’s instantaneous acceleration.
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An army tank division leaves the base and travels 30 km [S 30° E] and then turns and travels 70 km [S 10° W]. What is their total displacement from the base at the end of the trip? Calculate the average velocity for the tank if the trip lasted 2 hours.
You drive 9.00 km in a straight line in a direction 20° East of North.
(a) Find the distances you would have to drive straight East and then straight North to arrive at the same point. (This is equivalent to finding the components of the displacement along the East and North directions.)km Eastkm North
(b) Show that you still arrive at the same point if the East and North legs are reversed in order.
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Chapter 3 Solutions
Physics Fundamentals
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- A hawk flies in a horizontal arc of radius 12.0 m at a constant speed of 7.1 m/s. It continues to fly along the same horizontal arc but increases its speed at the rate of 7.9m/s2. Find the acceleration magnitude under these conditions.arrow_forwardA student drives 10 km to the north and then 20 km 30 degrees South of the east. By using the component method, what are the magnitude and direction of his displacement from the starting point?arrow_forwardAn airplane leaves the runway heading south and flies for 2000km. It then heads 20 degree west to avoid a storm. After flying for 500km, it turns 40 degree toward the east and flies another 400km to its final destination. Calculate the displacement of the plane;s destination and the distance it travelled.arrow_forward
- An airplane sets a compass course due west and maintains an airspeed (speed relative to the air) of 220 km/hr. After flying for 0.500 hours, the pilot finds herself over a town 120 km west and 20.0 km south of her starting point. a) Find the velocity of the wind (magnitude and direction). b) If the air speed is the same, but the wind is 40.0 km/hr due south, in what direction should the pilot fly to travel due west?arrow_forwardThe car speeds up as it turns a quarter circle curve from north to east. When exactly half-way around the curve the car's acceleration is = (2.07 m/s2, 10.8° South of East). Determine the components of that are tangent and perpendicular to the road.arrow_forwardA train slows down as it rounds a sharp horizontal turn, going from 90.0km/h to 50.0km/h in the 15.0s it takes to round the bend. The radius of the curve is 150m. Compute the acceleration at the moment the train speed reaches 50.0km/h. Assume the train continues to slow down at this time at the same ratearrow_forward
- A sailor in a small sailboat encounters shifting winds. She sails 8.00 km south, then 15 km 30deg E of N, and then 12km 25deg N of W. Use polygon method to determine magnitude and direction of her resultant displacement.arrow_forwardA bee flies 2 km [E] in 400s, then 4 km [E 75 degrees] in 2 000s. Calculate the speed and velocity of the trip.arrow_forwardA particle revolves in a horizontal circle of radius 1.99 m. At a particular instant, its acceleration is 1.8 m/s² in a direction that makes an angle of 35° to its direction of motion. Determine its speed (in m/s) AT THIS MOMENTarrow_forward
- The pronghorn antelope, found in North America, is the best long distance runner among mammals. It has been observed to travel at Ana everage speed of more than 55km/hr over a distance of 6.0 km. Suppose the antelope runs a distance of 5.0 km in a direction 11.5 degrees north of east, turns, and then runs 1.0 km south. Calculate the resultant displacement.arrow_forwardStarting from rest, a car speeds up along a curve at a rate of 2.00 m/s ^ 2 . If the curve has a radius of 20.0 m, what is the acceleration (both magnitude and direction ) of the car 5.00 s after starting ?arrow_forwardA field biologist is studying the migration patterns of northern gannets (a type of seabird). On one particularday, she records that they fly 5.0 km northeast, then turn toward to the south of east by 30 degrees and fly 4.0 kmin the new direction. How far north or south of their original position are the birds?arrow_forward
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