How many times is the coin tossed? var heads = 0;
var tails = 0;
var rolls = 100;
for(var i = 0; i < rolls; i++){
if(randomNumber(0,1) == 0){
heads++
} else {
tails++
}
}

100 times.

Explanation:

The code will loop until i is equal to or greater than roles. I starts at zero and increases by one after each toss.

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.