The correct answer is (i, iv).

Here's why:

(i) When a body is accelerated, its velocity always changes. This is because acceleration is defined as the rate of change of velocity. So, if a body is accelerating, it means its velocity is changing.

(iv) Its speed may or may not change. This is because speed is the magnitude of velocity. If a body is moving in a straight line and its speed is increasing or decreasing, then it is accelerating. However, a body can also accelerate by changing direction while maintaining a constant speed. For example, a body moving in a circular path with constant speed is accelerating because its direction of motion is constantly changing.

So, acceleration always involves a change in velocity, but it may or may not involve a change in speed.

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The correct answer is (i, iv).

Here's why:

(i) When a body is accelerated, its velocity always changes. This is because acceleration is defined as the rate of change of velocity. So, if a body is accelerating, it means its velocity is changing.

(iv) Its speed may or may not change. This is because speed is the magnitude of velocity. If a body is moving in a straight line and its speed is increasing or decreasing, then it is accelerating. However, a body can also accelerate by changing direction while maintaining a constant speed. For example, a body moving in a circular path with constant speed is accelerating because its direction of motion is constantly changing.

So, acceleration always involves a change in velocity, but it may or may not involve a change in speed.

Knowee AI · Accepted Answer

The correct answer is (i, iv).

Here's why:

(i) When a body is accelerated, its velocity always changes. This is because acceleration is defined as the rate of change of velocity. So, if a body is accelerating, it means its velocity is changing.

(iv) Its speed may or may not change. This is because speed is the magnitude of velocity. If a body is moving in a straight line and its speed is increasing or decreasing, then it is accelerating. However, a body can also accelerate by changing direction while maintaining a constant speed. For example, a body moving in a circular path with constant speed is accelerating because its direction of motion is constantly changing.

So, acceleration always involves a change in velocity, but it may or may not involve a change in speed.

When a body is accelerated(i) Its velocity always change(ii) Its speed always changes(iii) Its direction always changes(iv) Its speed may or may not change(i), (ii)(i, iv)(ii), (ii) (ii), (iii)

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