No, they aren’t the same. They somewhat are related but have different definitions.
Since the elevator is moving with a constant speed and not accelerating, the tension in the string is simply the normal, routine, everyday boring weight of the object. Since the elevator is moving with a constant speed and not accelerating, the tension in the string is simply the normal, routine, everyday boring weight of the object.
Answer:
Even though the sun is 330,000 times more massive than earth, the distance makes it so its gravitational pull on us is negligeable compared to the earth's.
Answer: 4/9π
Explanation:
Surfacearea of snowball(SA) =4πr^2
dSA/dT = - 10cm^2/min
d = 9, hence, r = 9/2 = 4.5
Taking the derivative of surface area with respect to time:
dSA/dT = 8πrdr/dt
dSA/dT = - 10, r = 4.5
-10 = 8π(4.5)dr/dt
-10 = 36πdr/dt
Make dr/dt subject of the formula
dr/dt = - 10/36π
d = 2r
Differentiating d with respect to time, 't'
dd/dt = 2dr/dt
Therefore, 2dr/dt = 2*(dr/dt)
2×(- 10/36π) = - 20/36π
= -4/9π
Therefore, rate by which diameter decreases when diameter is 9cm is
4/9 π
Answer:
Length of the stake will be 0.3623 m
Explanation:
We have given energy required to fully drive a stake into ground = 0.30 KJ = 300 J
Average resistive force acting on the floor is equal to F = 828 N
We have to find the length of the stake
We know that work done is given by
W = Fd, here W is work done , F is average force and d is the length of the stake
So 300 = 828×d
d = 0.3623 m
So length of the stake will be 0.3623 m
