Adisplacement b of 100m from the origin at an angle of 37° above the x axis is the result of three successive displacement : b1 of 100 along the negative x axis, b2 of 200m at an angle of 150° above the x axis and a displacement b3. find b3[ 355m, 353.5]

(353.1 m, -39.8 m)

Explanation:

Let's start by writing the components of the resultant displacement, B:

We know that this displacement is the result of three successive displacements, which can be written in terms of their components, as follows:

and , whose components are unknown.

The components of the resultant displacement must be equal to the sum of the components of each vector along each direction, therefore:

and

So, the vector b3 has components (353.1 m, -39.8 m).

Decrease occur in kinetic energy.

Explanation:

The kinetic energy decreases when the the Bob swings reaches to the maximum height because the motion of the bob slower down. At maximum height, the kinetic energy decreases whereas the value of potential energy is the highest. The main reason of higher potential energy is that it depends on height of an object while on the other hand, kinetic energy depends on the motion of an object so that's why the value of kinetic energy decreases and potential energy increases at maximum height of the bob.