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CBSE Class 11 Science Physics · Ch 3: Motion in a Plane

CBSE Class 11 Science Physics · Ch 3: Motion in a Plane is an online chapter test in the CBSE Class 11 Science pattern, covering Motion in a Plane. Attempt it on SeatBeat with a timer like the real exam, then see a detailed solution for every question and your score and weak-topic analysis.

30
Questions
20
Minutes
30
Marks
None
Negative marking
Unlock all 36 tests — ₹199Try Biology · Ch 1: The Living World free →

Topics in this test

TopicQuestions
Motion in a Plane30

Difficulty: 8 medium · 22 hard

Motion in a Plane MCQ questions with answers

The first 3 of 30 questions. Unlock the series for the rest, each with a solution.

  1. Q1. Which one of the following statements about vectors is INCORRECT?

    सदिशों के बारे में निम्नलिखित में से कौन-सा कथन असत्य (INCORRECT) है?

    • A. The resultant of two equal vectors is always zero / दो समान सदिशों का परिणामी सदैव शून्य होता है
    • B. The resultant of two vectors acting at a point is maximum when they are parallel / किसी बिंदु पर कार्यरत दो सदिशों का परिणामी तब अधिकतम होता है जब वे समांतर हों
    • C. A unit vector has magnitude one and only indicates direction / एक एकांक सदिश का परिमाण एक होता है और वह केवल दिशा को दर्शाता है
    • D. Two vectors can be added using the triangle law of vector addition / दो सदिशों को सदिश योग के त्रिभुज नियम द्वारा जोड़ा जा सकता है
    Solution

    The resultant of two equal vectors is zero only when they point in exactly opposite directions; in general it is not zero, so that statement is incorrect.

    दो समान सदिशों का परिणामी तभी शून्य होता है जब वे ठीक विपरीत दिशाओं में संकेत करें; सामान्यतः यह शून्य नहीं होता, अतः वह कथन असत्य है।

  2. Q2. A projectile is fired with a speed of $40\ \text{m/s}$ at an angle of $60^\circ$ with the horizontal. Its speed at the highest point of the trajectory is:

    एक प्रक्षेप्य को क्षैतिज से $60^\circ$ के कोण पर $40\ \text{m/s}$ की चाल से छोड़ा जाता है। प्रक्षेप पथ के उच्चतम बिंदु पर इसकी चाल है:

    • A. $20\ \text{m/s}$
    • B. $0\ \text{m/s}$
    • C. $34.6\ \text{m/s}$
    • D. $40\ \text{m/s}$
    Solution

    At the highest point the vertical velocity is zero, so the speed equals the horizontal component $u\cos\theta=40\cos 60^\circ=20\ \text{m/s}$.

    उच्चतम बिंदु पर ऊर्ध्वाधर वेग शून्य होता है, अतः चाल क्षैतिज घटक $u\cos\theta=40\cos 60^\circ=20\ \text{m/s}$ के बराबर होती है।

  3. Q3. A vector of magnitude $10\ \text{units}$ makes an angle of $60^\circ$ with the x-axis. The magnitude of its component along the x-axis is:

    $10\ \text{इकाई}$ परिमाण का एक सदिश x-अक्ष के साथ $60^\circ$ का कोण बनाता है। x-अक्ष के अनुदिश इसके घटक का परिमाण है:

    • A. $5\sqrt{3}\ \text{units}$ / $5\sqrt{3}\ \text{इकाई}$
    • B. $5\ \text{units}$ / $5\ \text{इकाई}$
    • C. $10\ \text{units}$ / $10\ \text{इकाई}$
    • D. $8.66\ \text{units}$ / $8.66\ \text{इकाई}$
    Solution

    The x-component is $A\cos\theta=10\cos 60^\circ=10\times0.5=5\ \text{units}$.

    x-घटक $A\cos\theta=10\cos 60^\circ=10\times0.5=5\ \text{इकाई}$ है।

Frequently asked questions

How many questions are in the CBSE Class 11 Science Physics · Ch 3: Motion in a Plane?

30 questions for 30 marks, to be answered in 20 minutes.

Is there negative marking in the CBSE Class 11 Science Physics · Ch 3: Motion in a Plane?

No — wrong answers are not penalised in this test.

Which topics does the CBSE Class 11 Science Physics · Ch 3: Motion in a Plane cover?

Motion in a Plane (30 questions).

Is the CBSE Class 11 Science Physics · Ch 3: Motion in a Plane free?

It is part of the CBSE Class 11 Science Test Series 2027 — Chapter-wise + Full Tests (36 tests, ₹199). You can first try Biology · Ch 1: The Living World for free.

More tests in the CBSE Class 11 Science Test Series 2027 — Chapter-wise + Full Tests

See the full CBSE Class 11 Science Test Series 2027 — Chapter-wise + Full Tests → · CBSE Class 11 Science: pattern, notification & syllabus →

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Motion in a Plane MCQ | CBSE Class 11 Science | SeatBeat