Question

find the radius of a 70 mm wheel (r=d/2).
o a 5mm
o b 35mm
o c 70mm
o d 1m
question 2 (1 point)
what is the circumference of a 70 mm wheel? (c=3.14 * d)
o a 3.14mm
o b 140mm
o c 219.8mm
o d 1m
question 3 (1 point)
the wheel rollout for a 100 mm multi - purpose wheel is 314mm (rollout = c).
o true
o false
question 4 (1 point)
which has more inertia, 5 kg of water or 6 kg of carbon steel?
o a water
o b steel
o c they have the same
o d inertia is my aunts name

Explanation:

Question 1

Step1: Substitute the diameter into the radius formula

Given \(R = \frac{D}{2}\) and \(D=70\) mm.
\(R=\frac{70}{2}\)

Step2: Calculate the value

\(R = 35\) mm

Question 2

Step1: Substitute the diameter into the circumference formula

Given \(C = 3.14\times D\) and \(D = 70\) mm.
\(C=3.14\times70\)

Step2: Calculate the value

\(C = 219.8\) mm

Question 3

Step1: Calculate the circumference of the \(100\) mm wheel

Given \(C = 3.14\times D\) and \(D = 100\) mm.
\(C=3.14\times100=314\) mm. Since rollout \(=C\), and the rollout is given as \(314\) mm.

Question 4

Step1: Recall the relationship between mass and inertia

Inertia is directly proportional to mass. The greater the mass, the greater the inertia.
Since \(6\) kg (mass of carbon - steel) \(>5\) kg (mass of water)

Answer:

Question 1: B. 35mm
Question 2: C. 219.8mm
Question 3: True
Question 4: B. Steel