Answer:
the frame of reference requires deciding where the object's initial position is and which direction will be considered positive.
Explanation:
<span>In this example, what is the independent variable?
a) The time of day assigned to exercise
<u>b) How long someone spent exercising </u>
c) Type of exercise
d) How many students are in the class
</span><span>What is the only form of psychological research that can determine cause and effect?
<u>a) Comparative Study </u>
b) Correlational Study
c) Survey
d) Experiment</span>
Answer:6m/s
Explanation:as you can see before twenty seconds there was no change in speed,but between twenty to thirty seconds,the speed changed from 0m/s to 6m/s,so change in speed is 6m/s.
Answer:
F=0
Explanation:
Newton's second law states that the sum of the external forces is equal to the product of the mass and the acceleration of the body
F = m a
in this case it tells us that the velocity is constant so the acceleration must be zero,
therefore the sum of the external forces is zero; as they indicate that the surface is frictionless, there is no force applied to the system to maintain a constant speed
F = 0
The wedge is an adaptation of the inclined plane. It can be used to raise a heavy load over a short distance or to split a log. The ideal mechanical advantage (IMA) of a wedge depends on the angle of the thin end. The smaller the angle, the less the force required to move the wedge a given distance through, say, a log.
