the acceleration will be 10 m/s^2
Explanation:
the force applied to an object and the acceleration of the object are directly proportional, as Newton's second law states:
where
F is the net force applied to the object
m is the object's mass
a is the object's acceleration
in the first example, a force F=45 N is applied to the object, giving it an acceleration of a=5 m/s^2. Therefore, the mass of the object is
In the second example, the force is doubled, so it will be F=90 N. The mass is still m=9 kg, so the acceleration will be
C) Manipulated by the experimenter
Explanation:
An independent variable is manipulated by the experimenter. For example, researching the effects of different amounts of water given to a plant. The amount of water is representative of an independent variable because it is being manipulated by the experimenter since it is being altered.