Explanation:
Given that,
Diameter of the wheel, d = 70 cm = 0.7 m
Initial angular speed, 
Final angular speed, 
Time, t = 4 s
(a) Angular acceleration,

(b) Tangential acceleration is :
Angular speed of the wheel after 2 seconds is :

Radial acceleration will be :

Hence, this is the required solution.
Answer:
i think the answer is 1000 kg but i might be wrong
<span>The role of Carbon in
steel is to increase hardness and tensile strength as well as response to heat
treatment (hardenability). Increased amounts of carbon also reduces
weldability. It is usually present to up to 2% carbon.</span>
Answer:
press a baloon against one pin it bursts
but now arrange lot of pins parallel closely to each other if u press a baloon against them it does not burst hope this helps u