Vector A has a magnitude of 25 units and points in the positive y-direction. When vector B is added to A, the resultant vector A
B points in the negative y-direction with a magnitude of 15 units. Find the magnitude and direction of B.
1 answer:
Answer:
B= -40
The negative sign indicates the reverse direction to that of vector A.That is it is in the third quadrant.
Explanation:
Th resultant vector is obtained by adding the two vectors A and B
A + B= AB
25 + B= -15
25+ 15= -B
-B = 40
B= -40
Vector B has a magnitude of 40 and points in the opposite direction to that of vector A. The negative indicates the opposite direction.
When we reverse the vector B for adding we place a negative sign with the magnitude.
A vector is quantity defined by magnitude and direction. If the direction is left out it becomes a scalar.
You might be interested in
Answer:
8.829 m/s²
Explanation:
M = Mass of Earth
m = Mass of Exoplanet
= Acceleration due to gravity on Earth = 9.81 m/s²
g = Acceleration due to gravity on Exoplanet
Dividing the equations we get
Acceleration due to gravity on the surface of the Exoplanet is 8.829 m/s²
What is your question exactly? I'm confused?
Answer:
Explanation:
Given data:
Let the distance traveled by the object in the second case be 
In the given problem, work done by the forces are same in both the cases.
Thus,
Answer:
a)η = 69.18 %
b)W= 1210 J
c)P=3967.21 W
Explanation:
Given that
Q₁ = 1749 J
Q₂ = 539 J
From first law of thermodynamics
Q₁ = Q₂ +W
W=Work out put
Q₂=Heat rejected to the cold reservoir
Q₁ =heat absorb by hot reservoir
W= Q₁- Q₂
W= 1210 J
The efficiency given as
η = 69.18 %
We know that rate of work done is known as power
P=3967.21 W
I would believe that this is false.
