A body moving along a straight line at 20 m/s undergoes an acceleration of 4 m/s2. After 2 s its speed will be (a) 8 m/s (b)10 m/s (c)16 m/s (d)28 m/s
Question
Solution 1
The final speed of a body can be calculated using the formula:
v = u + at
where: v = final speed u = initial speed a = acceleration t = time
Given in the problem: u = 20 m/s a = 4 m/s² t = 2 s
Substituting these values into the formula:
v = 20 m/s + 4 m/s² * 2 s = 20 m/s + 8 m/s = 28 m/s
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