The shadow of a pendulum cast on a flat board moves on a straight line. By placing the x-axis on the straight line with the origin at the middle of the total path, the x-coordinate of the shadow is given by the following function: x(t) = 45cos(πt), where t is in seconds and x is in centimeters. show answer No Attempt 25% Part (a) Find the speed, in centimeters per second, of the shadow at t = 1/4 s.

The speed of the shadow is -193 cm/s.

Explanation:

Give that,

The x-coordinate of the shadow is given by the following function is given by :

We need to find the speed of the shadow. The speed of particle in terms of displacement is given by :

At t = 1/4 seconds,

So, the speed of the shadow is -193 cm/s.

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

probably not if net force is zero