What is Physics? write any one formula related to Physics.
Answers
v = ds/dt
accelerationa̅ = ΔvΔta = dv/dt
equations of motionv = v0 + at
s = s0 + v0t + ½at2
v2 = v02 + 2a(s − s0)
Physics is a natural science based on experiments, measurements and mathematical analysis with the purpose of finding quantitative physical laws for everything from the nanoworld of the microcosmos to the planets, solar systems and galaxies that occupy the macrocosmos.
Free Fall Formula
Free fall as the term says, is a body falling freely because of the gravitational pull of our earth.
Imagine a body is falling freely for time t seconds, with velocity v, from a height h, due to gravity g.
Free Fall
Free Fall Formulas are three in number and are articulated as
[h\, =\, \frac{1}{2}\,gt^{2}]
[v^{2}\, =\, 2gh]
[v\, =\, gt]
Free fall is autonomous of the body’s mass. It only depends on height and the time period for which body is flung.
Free fall Problems Solved Examples
Underneath are given questions on free fall which may be useful for you.
Problem 1: Compute the height of the body if it is has a mass of 2 Kg and touches the ground after 5 seconds?
Answer:
Given: Height h = ?
Time t = 5s
We all are acquainted with the fact that free fall is independent of mass.
[Hence\, it\, is\, given\, as\, Height\, h\, =\, \frac{1}{2}gt^{2}]
[=\, 0.5\, \times\, 9.8\, \times\, (5)^{2}]
[=\, 122.5\, m.]
Problem 2: The cotton falls after 3 s and iron falls after 5 s. Which is moving with higher velocity?
Answer:The Velocity in free fall is autonomous of mass.
V (Velocity of iron) = gt = 9.8 m/s2 × 5s = 49 m/s
V (Velocity of cotton) = gt = 9.8 m/s2 × 3s = 29.4 m/s.
The Velocity of iron is more than cotton.
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