Velocity is a vector, which includes both magnitude and direction. Negative velocity means that B is travelling in an opposite direction of A.
Answer: large reflector located in orbit above the Earth's atmosphere
Explanation:
Since the student wants to see the big weather patterns in the upper atmosphere of the planet, and she will therefore need to have excellent resolution, the type of telescope that is ideal for her to use is a large reflector located in orbit above the Earth's atmosphere.
It should be noted that the refractor or a radio telescope isn't ideal in this situation as they will not capture the bug weather pattern and doesn't have an excellent resolution like the large reflector.
The sciatic nerve is a part of the Sacral Plexus
Answer:
Friction = 15.80 Newton
Explanation:
given
A pulling force (F) is 70N acting on the block of 10kg (M) which is placed on the ramp which is at an angle of 20° with the horizontal.
Irrespective to the ramp ,Weight of the body acts vertically downward , if we resolve the components of W=Mg as Mgsin20° (along the ramp) and Mgcos20° (perpendicular to the ramp) as shown in the attachment which contains FBD of the block
as given the body is Accelerating with an acceleration (a) of 2 m/ due to the pulling force . As friction always opposes the motion it acts in the backward direction to the pulling force .as shown in the figure attached
By Newton's 2nd Law
Ma = F - MgSin20°-friction
by subtituting the values we get
10(2) = 70 - 10(10)sin20° - friction
friction =70 - 100sin20° -20
friciton = 15.7979N
by rounding of ,
Frictional force is 15.80 Newton