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#plane motion

3 public questions tagged with this topic.

Acceleration and Velocity Analysis

In motion with constant acceleration in a plane, what happens if the acceleration is opposite to the initial velocity?

If the acceleration is opposite to the initial velocity, the object slows down, reverses direction, and then accelerates in the direction of the acceleration along a straight line. The path remains linear but with a change in direction. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives The object slows, reverses, and accelerates as the result, so option D is correct.

Ref: NCERT Class 11 Physics > Chapter 3: Motion in a Straight Line > Topic: Acceleration and Velocity Analysis - Part 8

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Acceleration and Velocity Analysis

For an object moving in a plane with constant acceleration, what is true about its velocity vector?

In motion with constant acceleration in a plane, the velocity vector changes in magnitude and/or direction over time because the acceleration continuously alters it. Unlike uniform motion, the velocity is not constant unless the acceleration is zero. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives It changes in magnitude and/or direction as the result, so option D is correct.

Ref: NCERT Class 11 Physics > Chapter 3: Motion in a Straight Line > Topic: Acceleration and Velocity Analysis - Part 8

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Equations of Motion and Problem Solving

A plane flies east at 40m/s while a wind blows north at 30m/s. What is the magnitude of the plane’s velocity relative to

Velocity components: vx=40m/s,vy=30m/s. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives 50 m/s as the result, so option B is correct.

Ref: NCERT Class 11 Physics > Chapter 3: Motion in a Straight Line > Topic: Equations of Motion and Problem Solving

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