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9 Questions around this concept.
There are two forces; their magnitude’s summation is 40 N and the resultant of them is 20N; The resultant force is perpendicular to the smaller force; The magnitudes of their forces are :
Assertion: When two perpendicular forces are there and the sum of their magnitude is 20N; Then the resultant of these forces is 14.42 N
Reason: Value of two forces 12 and 8
Definition- Force is defined as an effect which causes a body to change its state.
Force on 1 kg mass in the presence of gravity $\left(g=9.8 \mathrm{~m} / \mathrm{s}^2\right)$ is 1 kg-f=9.8 N
Unit of force-
1 Newton(N) is the force needed to accelerate an object with a mass of 1 kg at a rate of 1 m/s2 (1 N = 1 kg · m/s2)
2. Types of forces-
a) Contact forces-
Contact forces are due to direct physical contact between objects.
Types of contact forces-
b) Non-contact forces-
These forces act without the necessity of physical contact between objects.
They depend on the presence of a “field” in the region of space surrounding the body under consideration.
Types of non-contact forces-
c) Weak forces-
Vanderwaal force
d) Nuclear forces
$
\begin{aligned}
& F_{\text {nuclear }}>F_{\text {electro }}>F_{\text {gravitation }} \\
& F_e / F_g=10^{43}
\end{aligned}
$
Therefore, $F_e \gg F_g$
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