Which of these does an ideal pendulum experience? check all that apply. friction gravitational force normal force tension inertia

For ideal pendulum we will say

The string in that case must be massless and in-extensible

Frictional forces must be zero

there should not be any contact surface of pendulum

Whole mass of pendulum must be concentrated at the center

so above all conditions of pendulum we will say time period is given as

now the correct answer will be

gravitational  force

tension

inertia

Gravitational, tension and inertia have the ideal pendulum experience.

Option B,E,F

Explanation:

Ideal pendulum is an object or ball suspended by a thread which will freely vibrate from left to ring and then from right to left and this process repeats continuously.

The rod is suspended by a thread which represents tension, since it is always confined within its region, it is due to inertia, and gravity is the main force acting on all objects in the earth.

i would think klcio3

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.