Chapter Exam

Unit 5: Laws of Motion — Online MCQ Test

Q: The SI unit of force is:

Answer: B. Newton — Force is measured in newton (N) in the SI system.

Q: A 5 kg body is acted upon by a force of 20 N. Its acceleration is:

Answer: C. 4 m/s² — Using Newton's second law, a = F/m = 20/5 = 4 m/s².

Q: A 1 kg body moving with velocity 4 m/s experiences a constant force of 2 N in the same direction for 3 s. Its final momentum is:

Answer: C. 10 kg m/s — Initial momentum = mv = 1 × 4 = 4 kg m/s. Impulse = Ft = 2 × 3 = 6 kg m/s, so final momentum = 4 + 6 = 10 kg m/s.

PHYSICS · CLASS 11 INTERMEDIATE 1 YEAR · Telangana State Board

Practice Unit 5: Laws of Motion with a free chapter-wise online MCQ test for Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR PHYSICS. This chapter covers: Focusing on dynamics this chapter details intuition of force Newton three laws of motion linear momentum conservation friction types and uniform circular motion dynamics.. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Unit 5: Laws of Motion — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR PHYSICS — Unit 5: Laws of Motion, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is Newton's First Law of Motion?

A. F = ma
B. Every action has an equal and opposite reaction
C. A body continues in its state of rest or uniform motion unless acted upon by an external unbalanced force ✓
D. Momentum is always conserved in any situation

Answer: C. A body continues in its state of rest or uniform motion unless acted upon by an external unbalanced force
Newton's First Law states that a body does not change its state of rest or uniform motion unless an external unbalanced force acts on it.

The SI unit of force is:

A. Joule
B. Newton ✓
C. Watt
D. Pascal

Answer: B. Newton
Force is measured in newton (N) in the SI system.

A 5 kg body is acted upon by a force of 20 N. Its acceleration is:

A. 1 m/s²
B. 2 m/s²
C. 4 m/s² ✓
D. 10 m/s²

Answer: C. 4 m/s²
Using Newton's second law, a = F/m = 20/5 = 4 m/s².

Which of the following correctly compares static friction and sliding friction?

A. Static friction is always less than sliding friction
B. Static friction can vary from zero up to a limiting value, while sliding friction is nearly constant ✓
C. Sliding friction exists only when the body is at rest
D. Both are independent of the nature of surfaces

Answer: B. Static friction can vary from zero up to a limiting value, while sliding friction is nearly constant
Static friction adjusts its magnitude up to a limiting value, whereas sliding friction is approximately constant for a given pair of surfaces.

A 1 kg body moving with velocity 4 m/s experiences a constant force of 2 N in the same direction for 3 s. Its final momentum is: