Question

A simple pendulum swings from A to B and C and comes back to A​

Answer 1

Answer:

PLS MARK ME BRAINLIEST

Explanation:

a) point B

b) point A and point C

c) at all points mechanical energy will be constant

d) law of conservation of energy

e) this law states that energy can neither be created nor destroyed hence total energy remains same

Answer 2

Answer:

(a)At point B it will have maximum kinetic energy.

(b)At points A and C will have maximum potential energy.

(c)Mechanical energy will be constant.

(d)Law of conservation of energy.

(e)The total energy of an isolated system remains conserved.

Explanation:

The kinetic energy(K.E) of a simple pendulum is given as;

$K.E=\frac{1}{2} K(A^2-x^2)$          (1)

where,

K= spring constant

A= amplitude of oscillation

x=displacement of the pendulum

And potential energy(P.E) is given as;

$P.E=\frac{1}{2}Kx^2$                   (2)

At point A:

$x=A$

Then,

$K.E=\frac{1}{2}(A^2-A^2)=0$  

$P.E=\frac{1}{2} KA^2$  

At point B:

$x=0$

$K.E=\frac{1}{2}(A^2-0^2)=\frac{1}{2} KA^2$

$P.E=\frac{1}{2} K(0)^2=0$

At point C:

$x=A$

$K.E=\frac{1}{2}(A^2-A^2)=0$

$P.E=\frac{1}{2} KA^2$

Hence,

(a) At point B simple pendulum will have maximum kinetic energy.

(b) At points A and C simple pendulum will have maximum potential energy.

(c) At all points, the mechanical energy present in the swinging pendulum will be constant.

(d) Swinging pendulum follows the law of conservation of energy.

(e) Law of conservation of energy states that "the total energy of an isolated system remains conserved".