A wheel is making rotations about its axis with uniform angular acceleration. Starting from rest, it reaches 100 rot/s in 4 seconds. It's angular acceleration is

50 \frac{r o t}{s^{2}}

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25 \frac{r o t}{s^{2}}

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40 \frac{r o t}{s^{2}}

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500 π \frac{r a d i a n s}{s^{2}}

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Solution

The correct option is B $25 \frac{r o t}{s^{2}}$
Initial angular velocity = $ω_{0}$ = 0

Angular velocity after 4 seconds = $ω$ = $100$ $\frac{r o t}{s}$

We know, $ω$ = $100$ $\frac{r o t}{s}$ = $0 + α \times t$

$100$ = $4 α$

or $α$ = $25 \frac{r o t a t i o n s}{s^{2}}$

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A wheel is making rotations about its axis with uniform angular acceleration. Starting from rest, it reaches 100 rot/s in 4 seconds. It's angular acceleration is

The correct option is B 25 rots2Initial angular velocity = ω0 = 0 Angular velocity after 4 seconds = ω = 100 rots We know, ω = 100 rots = 0 + α × t 100 = 4α or α = 25 rotationss2

The correct option is B $25 \frac{r o t}{s^{2}}$
Initial angular velocity = $ω_{0}$ = 0

Angular velocity after 4 seconds = $ω$ = $100$ $\frac{r o t}{s}$

We know, $ω$ = $100$ $\frac{r o t}{s}$ = $0 + α \times t$

$100$ = $4 α$

or $α$ = $25 \frac{r o t a t i o n s}{s^{2}}$