Chapter Exam

Unit 4: Motion in a Plane — Online MCQ Test

Q: Which of the following is a vector quantity?

Answer: C. Displacement — Displacement has both magnitude and direction, so it is a vector quantity. Mass, speed, and time are scalars.

Q: The magnitude of the resultant of two vectors is maximum when the angle between them is:

Answer: A. 0° — The resultant is maximum when the two vectors act in the same direction, i.e., the angle between them is 0°.

Q: A person walking 3 km east and then 4 km north has a displacement of:

Answer: A. 5 km — Displacement is the straight-line distance from start to end. Using Pythagoras, it is √(3² + 4²) = 5 km.

Q: A projectile is thrown with speed u at an angle θ to the horizontal. Its time of flight is:

Answer: B. 2u sinθ / g — The total time of flight for a projectile launched and landing at the same level is T = 2u sinθ / g.

Q: A body is projected with speed u at angle θ. Which of the following is NOT a correct expression for the maximum height reached?

Answer: C. u² sin2θ / 2g — The correct maximum height is based on the vertical component of velocity: H = u² sin²θ / 2g. The expression with sin2θ is not correct.

PHYSICS · CLASS 11 INTERMEDIATE 1 YEAR · Telangana State Board

Practice Unit 4: Motion in a Plane with a free chapter-wise online MCQ test for Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR PHYSICS. This chapter covers: This chapter covers scalar and vector quantities vector addition and resolution relative velocity in two dimensions uniform circular motion and projectile motion parameters.. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Unit 4: Motion in a Plane — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR PHYSICS — Unit 4: Motion in a Plane, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is a vector quantity?

A. Mass
B. Speed
C. Displacement ✓
D. Time

Answer: C. Displacement
Displacement has both magnitude and direction, so it is a vector quantity. Mass, speed, and time are scalars.

The magnitude of the resultant of two vectors is maximum when the angle between them is:

A. 0° ✓
B. 45°
C. 90°
D. 180°

Answer: A. 0°
The resultant is maximum when the two vectors act in the same direction, i.e., the angle between them is 0°.

A person walking 3 km east and then 4 km north has a displacement of:

A. 5 km ✓
B. 7 km
C. 1 km
D. 12 km

Answer: A. 5 km
Displacement is the straight-line distance from start to end. Using Pythagoras, it is √(3² + 4²) = 5 km.

A projectile is thrown with speed u at an angle θ to the horizontal. Its time of flight is:

A. u sinθ / g
B. 2u sinθ / g ✓
C. u cosθ / g
D. u / g

Answer: B. 2u sinθ / g
The total time of flight for a projectile launched and landing at the same level is T = 2u sinθ / g.

A body is projected with speed u at angle θ. Which of the following is NOT a correct expression for the maximum height reached?

A. u² sin²θ / 2g
B. H = (u sinθ)² / 2g
C. u² sin2θ / 2g ✓
D. v_y² / 2g, where v_y = u sinθ

Answer: C. u² sin2θ / 2g
The correct maximum height is based on the vertical component of velocity: H = u² sin²θ / 2g. The expression with sin2θ is not correct.

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