Govt Exams
Using v = u + gt, where u = 0 (at rest), t = 2s, g = 10 m/s². Therefore v = 0 + 10 × 2 = 20 m/s.
1 amu = 1.66054 × 10⁻²⁷ kg. This is used to express atomic and molecular masses.
Newton's Law of Universal Gravitation states F = G(m₁m₂)/r². This is the fundamental law describing gravitational attraction between masses.
Temperature is a scalar quantity as it has only magnitude. Displacement, velocity, and acceleration are vector quantities as they have both magnitude and direction.
Air has a refractive index of approximately 1, which is the lowest among common materials
According to law of reflection, angle of incidence equals angle of reflection
Rainbows form due to refraction of sunlight entering water droplets and dispersion of different wavelengths
Pascal (Pa) is the SI unit of pressure, equal to 1 N/m²
Using v² = u² + 2as, where v = 0, u = 20 m/s, a = -5 m/s². We get s = 400/10 = 40 m
Newton is a derived unit (kg⋅m⋅s⁻²). Ampere, Kelvin, and Mole are SI base units