Answer:
The frictional force points up the incline.
Explanation:
It is given that, the crate is at rest on the incline. We know that the forces acting on the crate are force of gravity, normal and the force of friction. We know that the frictional force is the force that opposes the motion of an object.
In this case the crate is at rest. The crate will have static friction, that points up the incline.
So, the correct option is (A) "the frictional force points up the incline".
JAYLA OTHER KIDS ANSWER OUR QUESTIONS DID YOU KNOW THAT BESTFRIEND
Answer:
The Troposphere is the lowermost portion of Earth’s atmosphere. It is the densest layer of the atmosphere and contains approximately 75 percent of the mass of the atmosphere and almost all the water vapor and aerosol. The troposphere extends from the Earth’s surface up to the tropopause where the stratosphere begins.
Explanation:
The time it takes "to complete one cycle" is a perfect definition for <em>period</em>.
So the <em>2 sec</em> that you measured is the swing's period.
Frequency is just 1/period (the 'reciprocal' of the period).
For this swing, the frequency is 1/(2sec) = 0.5 per second = <em>0.5 Hz</em>.
( "Hertz" means "per second")
