Answer: a. Regularly, you rub your hands for warmth.
b. Some examples are friction from electricity going through a wire or friction from rubbing your hand together.
c. Without friction, we would fall every time we walked. Because there is friction, we can walk normally. Another example is a ball moving across the field. Without friction, the ball would not slow down.
Explanation:
Overall, friction is important to us because we depend on it.
The inverse hyperbolic cosecant of anything is a negative number.
In particular, csch⁻¹ [ (-1)/(2√30) ] = csch⁻¹ (≈ -0.0913) = ≈ -3.089
Whatever it is, negative numbers don't have logarithms.
Answer:
The elevator is not a inertial frame of reference.
Explanation:
Lets take load = W
The tension in the string =T
T= (1-0.1 )W
T=0.9 W
From Newtons second law
If elevator move up :
T- W = ma
T= W+ ma
It means that Tension is more than the W .But given that tension is 10% less than W.
If elevator move down:
W- T = m a
T= W - m a
Yes it is true.It means that elevator is moving downward.
So we can say that the elevator is not a inertial frame of reference.
