Practice problem 3.10 ### Fundamentals of Physics I - Practice Problems#### Page 76 - Practice Problem 3.6If the kicker gives the ball the same initial speed and angle but the ball is kicked from a point 25m from the goalpost, what is the height of the ball above the crossbar as it crosses over the goalpost? **Answer**: 1.2m.#### Page 77 - Practice Problem 3.7Suppose the pear is released from a height of 6.00m above the archer’s arrow, the arrow is shot at a speed of 30.0m/s, and the distance between the archer and the base of the tower is 15.0m. Find the time at which the arrow hits the pear, the distance the pear has fallen, and the height of the arrow above its release point. **Answers**: 0.54s, 1.4m, 4.6m.#### Page 80 - Practice Problem 3.8A more reasonable maximum acceleration for varying pavement conditions is 5.0m/s². Under these conditions, what is the maximum speed at which a car can negotiate a flat curve with radius 230m? **Answer**: 34m/s = 76mi/h.#### Page 81 - Practice Problem 3.9If the ride increases in speed so that T = 2.0s, what is \( a_{rad} \)? (This question can be answered by using proportional reasoning, without much arithmetic.) **Answer**: 49 m/s².#### Page 83 - Practice Problem 3.10If the plane its airspeed of 240km/h, but the wind decreases, what is the wind speed if the plane’s velocity with respect to earth is 15° east of north? **Answer**: 64 km/h.#### Page 84 - Practice Problem 3.11If the pilot was forced to reduce the plane’s speed to 150km/h, how much would she need to increase the angle at which the plane is pointing (relative to north) in order for the plane to continue to travel due north? **Answer**: 8.7°.

Given:- The plane's airspeed is 240 km/h. The wind decreases the plane's speed. The plane velocity…

Answered: If the plane its airspeed of 240km/h,…

If the plane its airspeed of 240km/h, but the wind decreases, what is the wind speed if the plane's velocity with respect to earth is 15° east of north? Answer: 64 km/h.

College Physics

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ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter3: Two-dimensional Kinematics

Section: Chapter Questions

Problem 28PE: (a) A daredevil is attempting to jump his motorcycle over a line of buses parked end to end by...

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Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.

Question

Practice problem 3.10

### Fundamentals of Physics I - Practice Problems

#### Page 76 - Practice Problem 3.6
If the kicker gives the ball the same initial speed and angle but the ball is kicked from a point 25m from the goalpost, what is the height of the ball above the crossbar as it crosses over the goalpost?
**Answer**: 1.2m.

#### Page 77 - Practice Problem 3.7
Suppose the pear is released from a height of 6.00m above the archer’s arrow, the arrow is shot at a speed of 30.0m/s, and the distance between the archer and the base of the tower is 15.0m. Find the time at which the arrow hits the pear, the distance the pear has fallen, and the height of the arrow above its release point.
**Answers**: 0.54s, 1.4m, 4.6m.

#### Page 80 - Practice Problem 3.8
A more reasonable maximum acceleration for varying pavement conditions is 5.0m/s². Under these conditions, what is the maximum speed at which a car can negotiate a flat curve with radius 230m?
**Answer**: 34m/s = 76mi/h.

#### Page 81 - Practice Problem 3.9
If the ride increases in speed so that T = 2.0s, what is \( a_{rad} \)? (This question can be answered by using proportional reasoning, without much arithmetic.)
**Answer**: 49 m/s².

#### Page 83 - Practice Problem 3.10
If the plane its airspeed of 240km/h, but the wind decreases, what is the wind speed if the plane’s velocity with respect to earth is 15° east of north?
**Answer**: 64 km/h.

#### Page 84 - Practice Problem 3.11
If the pilot was forced to reduce the plane’s speed to 150km/h, how much would she need to increase the angle at which the plane is pointing (relative to north) in order for the plane to continue to travel due north?
**Answer**: 8.7°.

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