Describe the K. E. and P. E. of each component of the pendulum device, i. e. the spring, the ball, and the pendulum (or, in parts c and d, the ball and pendulum combined) at the following times. Answer in terms of whether the various forms of energy of each component are decreasing, increasing, constant, 0,0, maximum or minimum for this system, etc. Answer thoroughly, and note that more than one of these terms may apply.

a) to when all is at rest before firing the ball.
b) t,, immediately before the collision.
c) t2, immediately after the collision.
d) ts, when all is at rest after the collision.

a) to when all is at rest before firing the ball.

The spring is compressed and elastic potential energy of spring is maximum and kinetic energy of the ball is 0

b) t₁, immediately before the collision.

The spring is not compressed and elastic potential energy of spring is 0, however ball has maximum kinetic energy from t₀→t₁, kinetic energy of the ball is increasing and potential energy of spring is decreasing

c) t₂, immediately after the collision.

Kinetic energy of the ball and pendulum has decreased and potential energy of combination is 0

d) , when all is at rest after the collision.

Potential energy of the system has increased to maximum values and kinetic energy has decreased to 0..

electromagnetic waves travel through space with vacuums. give me brainliest if right.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards