CDS/CAPF 2025 Physics - Lecture 3: Units & Measurement

What is the displacement of a boy who completes one round of a circular track of diameter 200m in 30s, after 3 minutes and 45 seconds?

What will be the displacements of an athlete completing one round of a circular track of diameter 100m in 20s after 1 minute and 10s?

Which statement accurately describes the properties of distance and displacement?

In the CGS system, what is the base unit for length?

How is a speed of 54 km/h expressed in m/s?

What physical quantity corresponds to the dimension [M0L1T-2]?

What are certain physical quantities called that are derived from the base quantities?

Which of the following correctly identifies a unit of time?

CDS/CAPF 2025 Physics - Lecture 3: Unit and Measurement

Topics covered include: Unit and Measurement, Remaining topics, Velocity, Acceleration, Speed, DPP Solutions, and Dimensional formulas.
Topics are listed in bullet points: Unit and Measurement, Velocity, Acceleration, Speed, DPP Solutions, and Dimensional formulas are sub-topics.
A boy completes one round of a circular track with a diameter of 200 m in 30 seconds. His displacement after 3 minutes and 45 seconds is 0 m.
An athlete completes one lap of a circular track with a 100 m diameter in 20 seconds. Their displacement after 1 minute and 10 seconds is 100 m.
Light year: 9.46 x 10¹⁵ m
Astronomical Unit (AU): 1.496 x 10¹¹ m (mean distance of Earth from the Sun)
Parsec: 3.26 x 10¹⁶ m.
1 C.S.L. is 1.4 times the mass of the Sun.
1 fermi = 10^-15 m
1 Angstrom = 10^-10 m
1 Nanometer = 10^-9 m
1 micron = 10^-6 m
SI unit of speed: m/s
SI unit of acceleration: m/s²
Dimensional formula for acceleration: [ML^-1T^-2]
Dimensional formula of work: [ML²T^-2]
Strain is dimensionless
The unit for Coulomb constant is Nm²C^-2
The unit of power is equivalent to joule per second.
Speed is a scalar quantity
Dimensions of power: [ML²T^-3]
Dimensions of torque: [ML²T^-2]

This quiz covers key concepts from Lecture 3 of the CDS/CAPF 2025 Physics course, focusing on Unit and Measurement, Velocity, Acceleration, and Speed. Dive into practical examples including circular tracks and explore dimensional formulas to enhance your understanding. Test your knowledge with a range of questions designed to solidify your grasp on these fundamental topics.