In many textbook problems, we ignore certain complications such as friction and drag. The problems contain key words that indicate such a simplification is being used. For example, if a surface is described as “slippery,” it means that we can ignore friction. Look at the previous chapters’ problem sets. Find five uses of these key words and explain how to interpret each case.

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Answer 1

Textbook Question

Chapter 6, Problem 1PQ

In many textbook problems, we ignore certain complications such as friction and drag. The problems contain key words that indicate such a simplification is being used. For example, if a surface is described as “slippery,” it means that we can ignore friction. Look at the previous chapters’ problem sets. Find five uses of these key words and explain how to interpret each case.

Expert Solution & Answer

To determine

The simplification of problems by using keywords.

Answer to Problem 1PQ

Some keywords that simplify the problem are constant speed, straight line motion, parabolic trajectory, etc.

Explanation of Solution

In most cases, friction and air drag are neglected unless and until mentioned. When it is given “constant speed along a straight line path”, it implies that the acceleration and the net force on the moving body is zero. Also if the motion is along a straight line, the distance and displacement are the same and hence the speed and velocity are same.

When mentioned “follows a parabolic trajectory”, it means that the object undergoes projectile motion with negligible air resistance. An object “subjected to constant acceleration suddenly” would mean that the change in acceleration can be considered instantaneous.

While blocks on ice are considered, frictional force is ignored because they are negligibly small.

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Students have asked these similar questions

A student suggests that the force of air resistance FA depends on the relative speed of an object passing through the air v according to FA = kvN, where k is a constant with appropriate units that depends on properties of the air and the size and shape of the object and N is a dimensionless exponent. The student has a hollow ball made of two hemispherical shells that can be connected together and disconnected, along with access to other commonly available materials. Write an experimental procedure that the student could follow to make measurements in order to find the value of N, and explain how a graph of In(FA) vs. In(v) could be used to find the values of k and N.

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Answer 2

Textbook Question

Chapter 6, Problem 1PQ

In many textbook problems, we ignore certain complications such as friction and drag. The problems contain key words that indicate such a simplification is being used. For example, if a surface is described as “slippery,” it means that we can ignore friction. Look at the previous chapters’ problem sets. Find five uses of these key words and explain how to interpret each case.

Expert Solution & Answer

To determine

The simplification of problems by using keywords.

Answer to Problem 1PQ

Some keywords that simplify the problem are constant speed, straight line motion, parabolic trajectory, etc.

Explanation of Solution

In most cases, friction and air drag are neglected unless and until mentioned. When it is given “constant speed along a straight line path”, it implies that the acceleration and the net force on the moving body is zero. Also if the motion is along a straight line, the distance and displacement are the same and hence the speed and velocity are same.

When mentioned “follows a parabolic trajectory”, it means that the object undergoes projectile motion with negligible air resistance. An object “subjected to constant acceleration suddenly” would mean that the change in acceleration can be considered instantaneous.

While blocks on ice are considered, frictional force is ignored because they are negligibly small.

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Answer 3

Textbook Question

Chapter 6, Problem 1PQ

In many textbook problems, we ignore certain complications such as friction and drag. The problems contain key words that indicate such a simplification is being used. For example, if a surface is described as “slippery,” it means that we can ignore friction. Look at the previous chapters’ problem sets. Find five uses of these key words and explain how to interpret each case.

Expert Solution & Answer

To determine

The simplification of problems by using keywords.

Answer to Problem 1PQ

Some keywords that simplify the problem are constant speed, straight line motion, parabolic trajectory, etc.

Explanation of Solution

In most cases, friction and air drag are neglected unless and until mentioned. When it is given “constant speed along a straight line path”, it implies that the acceleration and the net force on the moving body is zero. Also if the motion is along a straight line, the distance and displacement are the same and hence the speed and velocity are same.

When mentioned “follows a parabolic trajectory”, it means that the object undergoes projectile motion with negligible air resistance. An object “subjected to constant acceleration suddenly” would mean that the change in acceleration can be considered instantaneous.

While blocks on ice are considered, frictional force is ignored because they are negligibly small.

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Answer 4

Textbook Question

Chapter 6, Problem 1PQ

In many textbook problems, we ignore certain complications such as friction and drag. The problems contain key words that indicate such a simplification is being used. For example, if a surface is described as “slippery,” it means that we can ignore friction. Look at the previous chapters’ problem sets. Find five uses of these key words and explain how to interpret each case.

Expert Solution & Answer

To determine

The simplification of problems by using keywords.

Answer to Problem 1PQ

Some keywords that simplify the problem are constant speed, straight line motion, parabolic trajectory, etc.

Explanation of Solution

In most cases, friction and air drag are neglected unless and until mentioned. When it is given “constant speed along a straight line path”, it implies that the acceleration and the net force on the moving body is zero. Also if the motion is along a straight line, the distance and displacement are the same and hence the speed and velocity are same.

When mentioned “follows a parabolic trajectory”, it means that the object undergoes projectile motion with negligible air resistance. An object “subjected to constant acceleration suddenly” would mean that the change in acceleration can be considered instantaneous.

While blocks on ice are considered, frictional force is ignored because they are negligibly small.

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Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

To determine

The simplification of problems by using keywords.

Answer to Problem 1PQ

Some keywords that simplify the problem are constant speed, straight line motion, parabolic trajectory, etc.

Explanation of Solution

In most cases, friction and air drag are neglected unless and until mentioned. When it is given “constant speed along a straight line path”, it implies that the acceleration and the net force on the moving body is zero. Also if the motion is along a straight line, the distance and displacement are the same and hence the speed and velocity are same.

When mentioned “follows a parabolic trajectory”, it means that the object undergoes projectile motion with negligible air resistance. An object “subjected to constant acceleration suddenly” would mean that the change in acceleration can be considered instantaneous.

While blocks on ice are considered, frictional force is ignored because they are negligibly small.

Answer 8

Expert Solution & Answer

To determine

The simplification of problems by using keywords.

Answer to Problem 1PQ

Some keywords that simplify the problem are constant speed, straight line motion, parabolic trajectory, etc.

Explanation of Solution

In most cases, friction and air drag are neglected unless and until mentioned. When it is given “constant speed along a straight line path”, it implies that the acceleration and the net force on the moving body is zero. Also if the motion is along a straight line, the distance and displacement are the same and hence the speed and velocity are same.

When mentioned “follows a parabolic trajectory”, it means that the object undergoes projectile motion with negligible air resistance. An object “subjected to constant acceleration suddenly” would mean that the change in acceleration can be considered instantaneous.

While blocks on ice are considered, frictional force is ignored because they are negligibly small.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

To determine

The simplification of problems by using keywords.

Answer 12

Answer to Problem 1PQ

Some keywords that simplify the problem are constant speed, straight line motion, parabolic trajectory, etc.

Answer 13

Explanation of Solution

In most cases, friction and air drag are neglected unless and until mentioned. When it is given “constant speed along a straight line path”, it implies that the acceleration and the net force on the moving body is zero. Also if the motion is along a straight line, the distance and displacement are the same and hence the speed and velocity are same.

When mentioned “follows a parabolic trajectory”, it means that the object undergoes projectile motion with negligible air resistance. An object “subjected to constant acceleration suddenly” would mean that the change in acceleration can be considered instantaneous.

While blocks on ice are considered, frictional force is ignored because they are negligibly small.

Answer 14

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