F = 2820.1 N
Explanation:
Let the (+)x-axis be up along the slope. The component of the weight of the crate along the slope is -mgsin15° (pointing down the slope). The force that keeps the crate from sliding is F. Therefore, we can write Newton's 2nd law along the x-axis as
Fnet = ma = 0 (a = 0 no sliding)
= F - mgsin15°
= 0
or
F = mgsin15°
= (120 kg)(9.8 m/s^2)sin15°
= 2820.1 N
Im not so sure but it should be the
instantaneous speed
The average velocity is obtained by ( u + v)/2.
<h3>What is average velocity?</h3>
The term velocity refers to the rate of change of displacement with time. Velocity is a vector quantity thus it has both magnitude and direction. The velocity of a body could also be shown by the use of the vector notation.
To obtain the average velocity;
Let the initial velocity be u
Let the final velocity be v
It then follows that the average velocity = ( u + v)/2
Learn more about average velocity:brainly.com/question/862972
#SPJ1
D.
Sasha is informing participants about the study and making sure they wish to participate.
