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Motion in a Plane Practice Questions

Class 11 · Physics · 1124 free MCQs with instant results and detailed explanations.

1124
Total
470
Easy
507
Medium
147
Hard

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Topics in Motion in a Plane

Projectile Motion 326
Vectors 424
Uniform Circular Motion 374

Sample Questions from Motion in a Plane

Here are 10 sample questions. Start a quiz to get randomized questions with scoring.

Q1
Easy
Which of the following represents a vector quantity?
A. Speed
B. Distance
C. Force
D. Mass
Show Answer & Explanation
Correct Answer: C
Force has both magnitude and direction, making it a vector quantity.
Q2
Easy
If a vector A = 3i + 4j, what is the magnitude of A?
A. 5
B. 7
C. 12
D. 1
Show Answer & Explanation
Correct Answer: A
Magnitude of vector A is calculated using √(x^2 + y^2) = √(3^2 + 4^2) = 5.
Q3
Easy
Which of the following operations is used to add two vectors graphically?
A. Subtraction
B. Triangle law
C. Dot product
D. Scalar multiplication
Show Answer & Explanation
Correct Answer: B
The Triangle law states that if two vectors are represented as two sides of a triangle, the resultant is represented by the third side.
Q4
Medium
Which of the following is a vector quantity?
A. Speed
B. Distance
C. Acceleration
D. Mass
Show Answer & Explanation
Correct Answer: C
Acceleration has both magnitude and direction, making it a vector quantity.
Q5
Medium
A vector A has a magnitude of 5 units, and vector B has a magnitude of 3 units. If both vectors are in the same direction, what is the magnitude of A + B?
A. 8 units
B. 15 units
C. 2 units
D. 1 unit
Show Answer & Explanation
Correct Answer: A
When vectors are in the same direction, their magnitudes add up directly.
Q6
Medium
A car travels 30 km East and then 40 km North. What is the magnitude of the resultant displacement?
A. 70 km
B. 50 km
C. 10 km
D. 30 km
Show Answer & Explanation
Correct Answer: B
Using the Pythagorean theorem, the resultant displacement is √(30² + 40²) = √(900 + 1600) = √2500 = 50 km.
Q7
Medium
If two vectors A and B are equal in magnitude and direction, which of the following is true?
A. A + B = 0
B. A - B = 0
C. A = -B
D. A + B = A
Show Answer & Explanation
Correct Answer: B
If A and B are equal, subtracting them results in the zero vector: A - B = 0.
Q8
Hard
A particle moves in the xy-plane with a position vector r(t) = (3t)i + (2t^2)j. What is the velocity vector v(t) at time t?
A. (3)i + (4t)j
B. (3t^2)i + (2)j
C. (2t)i + (3)j
D. (2t^2)i + (4)j
Show Answer & Explanation
Correct Answer: A
Velocity is the derivative of the position vector. Therefore, v(t) = dr/dt = (3)i + (4t)j.
Q9
Hard
A vector A = 5i + 12j is reflected across the line y = x. What is the vector after reflection?
A. 12i + 5j
B. 5i - 12j
C. -5i + 12j
D. 12i - 5j
Show Answer & Explanation
Correct Answer: A
Reflecting a vector across y = x swaps the components. Thus, A becomes 12i + 5j.
Q10
Hard
A particle moves in a circular path with a radius of 5 m. If it completes one full revolution in 10 seconds, what is the magnitude of its average velocity over one complete revolution?
A. 0 m/s
B. 3.14 m/s
C. 5 m/s
D. 31.4 m/s
Show Answer & Explanation
Correct Answer: A
The average velocity is defined as the total displacement divided by the total time. In one full revolution, the displacement is zero, hence average velocity is 0 m/s.

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Motion in a Plane — Class 11 Physics Practice Questions Online

This page contains 1124 practice MCQs for the chapter Motion in a Plane in Class 11 Physics. The questions are organized by difficulty — 470 easy, 507 medium, 147 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 3 topics, giving you comprehensive coverage of the entire chapter.