Answer question number 1 Assessment1. A rolling ball moves from x, = 8.4 cm to x, = -4.2 cm to during the time from t, = 3.0 s to t, =6.1 s. What is its average velocity over this time interval?2. At highway speeds, a particular automobile is capable of an acceleration of about 1.8 m/s². Atthis rate, how long does it take to accelerate from 65 km/h to 120 km/h.3. A world-class sprinter can reach a top speed (of about 11.5 m/s) in the first 18.0 m of a race.What is the average acceleration of this sprinter and how long does it take her to reach thatspeed?4. Estimate (a) how long it took King Kong to fall straight down from the top of the Empire StateBuilding (380 m high), and (b) his velocity just before "landing."5. Graphically determine the resultant of the following three vector displacements: (1) 24 m, 36°north of east; (2) 18 m, 37° east of north; and (3) 26 m, 33° west of south.6. The summit of a mountain, 2450 m above base camp, is measured on a map to be 4580 mhorizontally from the camp in a direction 38.4° west of north. What are the components of thedisplacement vector from camp to summit? What is its magnitude? Choose the x axis east, yaxis north, and z axis up.7. A ball is thrown horizontally from the roof of a building 7.5 m tall and lands 9.5 m from the base.What was the ball's initial speed?

The displacement of an object is defined as the change in the final and initial position of an…

Answered: 1. A rolling ball moves from x1 = 8.4…

1. A rolling ball moves from x1 = 8.4 cm to x2 = -4.2 cm to during the time from t, = 3.0 s to tz = 6.1 s. What is its average velocity over this time interval?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter2: One Dimensional Motion

Section: Chapter Questions

Problem 30PQ: A The instantaneous speed of a particle moving along one straight line is v(t) = ate5t, where the...

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Question

Answer question number 1

Assessment
1. A rolling ball moves from x, = 8.4 cm to x, = -4.2 cm to during the time from t, = 3.0 s to t, =
6.1 s. What is its average velocity over this time interval?
2. At highway speeds, a particular automobile is capable of an acceleration of about 1.8 m/s². At
this rate, how long does it take to accelerate from 65 km/h to 120 km/h.
3. A world-class sprinter can reach a top speed (of about 11.5 m/s) in the first 18.0 m of a race.
What is the average acceleration of this sprinter and how long does it take her to reach that
speed?
4. Estimate (a) how long it took King Kong to fall straight down from the top of the Empire State
Building (380 m high), and (b) his velocity just before "landing."
5. Graphically determine the resultant of the following three vector displacements: (1) 24 m, 36°
north of east; (2) 18 m, 37° east of north; and (3) 26 m, 33° west of south.
6. The summit of a mountain, 2450 m above base camp, is measured on a map to be 4580 m
horizontally from the camp in a direction 38.4° west of north. What are the components of the
displacement vector from camp to summit? What is its magnitude? Choose the x axis east, y
axis north, and z axis up.
7. A ball is thrown horizontally from the roof of a building 7.5 m tall and lands 9.5 m from the base.
What was the ball's initial speed?

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