Its a. B. Its the arrow thats going up the opposite way. Hope this helps! (i know im late too)
Answer:
V = 0.9 m/s
Explanation:
The parameters given are:
Initial velocity U = 6.4 m/s
Time t = 0.64s
Height h = 2.05 m
To find the final velocity, let us use third equation of motion
V^2 = U^2 - 2gH
Since the ball is going upward, g will be negative
Substitute all the parameters into the formula
V^2 = 6.4^2 - 2 × 9.8 × 2.05
V^2 = 40.96 - 40.18
V^2 = 0.78
V = sqrt( 0.78)
V = 0.883 m/ s
V = 0.9 m/ s approximately
Answer:
12.56 A.
Explanation:
The magnetic field of a conductor carrying current is give as
H = I/2πr ............................... Equation 1
Where H = Magnetic Field, I = current, r = distance, and π = pie
Making I the subject of the equation,
I = 2πrH............... Equation 2
Given: H = 1 T, r = 2 m.
Constant: π = 3.14
Substitute into equation 2
I = 2×3.14×2×1
I = 12.56 A.
Hence, the magnetic field = 12.56 A.
Answer:
7.745 feet
Explanation:
Data provided:
Length of the pole, L = 6 feet
Distance between the stake from the bottom of the pole, B = 4 feet
let the length of the rope be 'x'
Now,
The top of the pole, the bottom of the pole and the stake forms a right angled triangle.
Thus,
Using the concept of Pythagoras theorem,
we have
length of the pole as perpendicular, Distance between the stake from the bottom of the pole as base and length of the rope as hypotenuse
therefore,
L² + B² = x²
on substituting the values, we get
6² + 4² = x²
or
x = √60
or
x = 7.745 feet
43.75N (assuming only friction)