An independent variable is a. )directly changed by the experimenter. b. )manipulated by changes to the dependent variable. c. )a variable that is kept constant. d. )a variable that is used as a control.

A

Explanation:

The independent variable in an experiment is the variable that dictates the outcome of the experiment (for example, if the experiment is to determine how much water is required for a plant to grow optimally, then water is the independent variable because the outcome of the experiment (how well the plants grow) is dependent on it).

Hence, in an experiment, the experimenter will test how different inputs will affect the outcome. So therefore, the experimenter will need to change the independent variable, in order to get reliable results.

f=ma a/f/m a= 480/60 a = 8m/s/s that is quick wow

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft