Gr 10 Physical Sciences Ch 16: Instantaneous velocity and speed

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What is the unit of instantaneous velocity?

Metre per second (m·s⁻¹) (correct)

Kilogram per second (kg·s⁻¹)

Metre per second squared (m·s⁻²)

Joule per second (J·s⁻¹)

What is the difference between instantaneous velocity and instantaneous speed?

Instantaneous velocity is a scalar, while instantaneous speed is a vector.

Instantaneous velocity is a vector, while instantaneous speed is a scalar. (correct)

Instantaneous velocity is always positive, while instantaneous speed is always negative.

Instantaneous velocity is the rate of change of position, while instantaneous speed is the rate of change of distance.

What is the formula for instantaneous velocity?

v = Δx / Δt

v = Δx / Δt²

v = 1 / (Δt / Δx)

v = lim(Δt → 0) Δx / Δt (correct)

Why is it important to distinguish between an instant in time and a time interval?

Because instantaneous velocity can vary significantly over short intervals. (D) Signup and view all the answers

What is the difference between instantaneous velocity and average velocity?

Instantaneous velocity is the velocity at a specific instant in time, while average velocity is the velocity over a time interval. (C) Signup and view all the answers

What is the definition of instantaneous speed?

The magnitude of the instantaneous velocity. (A) Signup and view all the answers

What is the characteristic of instantaneous velocity that is not present in instantaneous speed?

Direction (C) Signup and view all the answers

In what type of scenario does instantaneous velocity vary significantly over short intervals?

When an object is accelerating or decelerating. (C) Signup and view all the answers

What is the primary purpose of understanding instantaneous velocity and speed?

To accurately describe motion, especially when velocity varies over time (C) Signup and view all the answers

What can be inferred about an object's motion if its instantaneous velocity is changing?

The object is accelerating or decelerating (B) Signup and view all the answers

Why is instantaneous velocity a vector quantity?

Because it has both magnitude and direction (B) Signup and view all the answers

What is an example of a scenario where instantaneous velocity can vary significantly over short intervals?

A sprinter accelerating at the start of a race (A) Signup and view all the answers

What is the relationship between instantaneous speed and instantaneous velocity?

Instantaneous speed is the magnitude of instantaneous velocity (C) Signup and view all the answers

When is instantaneous velocity most relevant?

When describing motion at a specific instant in time (D) Signup and view all the answers

What is a key characteristic of instantaneous velocity that distinguishes it from average velocity?

It can vary significantly over short intervals (D) Signup and view all the answers

Why is it essential to consider instantaneous velocity and speed when analyzing motion?

To accurately describe motion, especially when velocity varies over time (A) Signup and view all the answers

What does instantaneous velocity represent?

The rate of change of position at a specific instant in time (D) Signup and view all the answers

Why is it essential to consider instantaneous velocity when analyzing motion?

Because it provides a snapshot of an object's motion at a specific instant in time (A) Signup and view all the answers

What is the primary difference between instantaneous velocity and instantaneous speed?

Instantaneous velocity has direction, while instantaneous speed does not (A) Signup and view all the answers

In what type of scenario would an object's instantaneous velocity be constant?

When the object is moving at a constant speed (B) Signup and view all the answers

What can be inferred about an object's motion if its instantaneous velocity is zero?

The object is at rest (B) Signup and view all the answers

Why is it important to distinguish between instantaneous velocity and average velocity?

Because instantaneous velocity varies significantly over short intervals, while average velocity does not (B) Signup and view all the answers

What is the relationship between the magnitude of instantaneous velocity and instantaneous speed?

Instantaneous speed is equal to the magnitude of instantaneous velocity (A) Signup and view all the answers

When is instantaneous velocity most relevant in describing an object's motion?

When the object is accelerating or decelerating (B) Signup and view all the answers

What is a characteristic of instantaneous velocity that distinguishes it from other types of velocity?

It represents the rate of change of position at a specific instant (B) Signup and view all the answers

What is the primary reason why instantaneous velocity might vary significantly over short intervals?

Due to changes in the object's acceleration or deceleration (A) Signup and view all the answers

What is a key difference between instantaneous velocity and speed?

Instantaneous velocity is a vector quantity, while speed is a scalar quantity (D) Signup and view all the answers

What is a scenario where instantaneous velocity is particularly relevant?

When an object is accelerating or decelerating (A) Signup and view all the answers

What is the effect of an object's acceleration on its instantaneous velocity?

It increases the object's instantaneous velocity (D) Signup and view all the answers

What is the relationship between the magnitude of instantaneous velocity and instantaneous speed?

The magnitude of instantaneous velocity is equal to instantaneous speed (B) Signup and view all the answers

What is the significance of considering instantaneous velocity when analyzing motion?

It provides a snapshot of the object's motion at a specific instant (B) Signup and view all the answers

What is a key distinction between instantaneous velocity and average velocity?

Instantaneous velocity represents the rate of change of position over a specific time interval, while average velocity represents the rate of change of position over the entire time interval (A) Signup and view all the answers

What is the primary factor that contributes to the difference between instantaneous velocity and average velocity?

Time interval considered (B) Signup and view all the answers

If an object's instantaneous velocity is constant, what can be inferred about its motion?

It is moving in a straight line (D) Signup and view all the answers

Why is it crucial to understand instantaneous velocity and speed in describing motion?

To accurately describe the object's motion, especially when velocity varies over time (B) Signup and view all the answers

What is the relationship between instantaneous velocity and instantaneous speed?

Instantaneous speed is the magnitude of instantaneous velocity (A) Signup and view all the answers

In which scenario would an object's instantaneous velocity be most relevant?

When the object's velocity is increasing or decreasing rapidly (D) Signup and view all the answers

Gr 10 Physical Sciences Ch 16: Instantaneous velocity and speed

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Questions and Answers

What is the unit of instantaneous velocity?

What is the difference between instantaneous velocity and instantaneous speed?

What is the formula for instantaneous velocity?

Why is it important to distinguish between an instant in time and a time interval?

What is the difference between instantaneous velocity and average velocity?

What is the definition of instantaneous speed?

What is the characteristic of instantaneous velocity that is not present in instantaneous speed?

In what type of scenario does instantaneous velocity vary significantly over short intervals?

What is the primary purpose of understanding instantaneous velocity and speed?

What can be inferred about an object's motion if its instantaneous velocity is changing?

Why is instantaneous velocity a vector quantity?

What is an example of a scenario where instantaneous velocity can vary significantly over short intervals?

What is the relationship between instantaneous speed and instantaneous velocity?

When is instantaneous velocity most relevant?

What is a key characteristic of instantaneous velocity that distinguishes it from average velocity?

Why is it essential to consider instantaneous velocity and speed when analyzing motion?

What does instantaneous velocity represent?

Why is it essential to consider instantaneous velocity when analyzing motion?

What is the primary difference between instantaneous velocity and instantaneous speed?

In what type of scenario would an object's instantaneous velocity be constant?

What can be inferred about an object's motion if its instantaneous velocity is zero?

Why is it important to distinguish between instantaneous velocity and average velocity?

What is the relationship between the magnitude of instantaneous velocity and instantaneous speed?

When is instantaneous velocity most relevant in describing an object's motion?

What is a characteristic of instantaneous velocity that distinguishes it from other types of velocity?

What is the primary reason why instantaneous velocity might vary significantly over short intervals?

What is a key difference between instantaneous velocity and speed?

What is a scenario where instantaneous velocity is particularly relevant?

What is the effect of an object's acceleration on its instantaneous velocity?

What is the relationship between the magnitude of instantaneous velocity and instantaneous speed?

What is the significance of considering instantaneous velocity when analyzing motion?

What is a key distinction between instantaneous velocity and average velocity?

What is the primary factor that contributes to the difference between instantaneous velocity and average velocity?

If an object's instantaneous velocity is constant, what can be inferred about its motion?

Why is it crucial to understand instantaneous velocity and speed in describing motion?

What is the relationship between instantaneous velocity and instantaneous speed?

In which scenario would an object's instantaneous velocity be most relevant?

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