An electron has a constant acceleration of +2.4 m/s^2. At a certain instant its velocity is +9.3 m/s. What is its velocity (a) 1.6 s earlier and (b) 1.6 s later ?

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Answer 1 · 2015-09-09T12:09:46

(a). #5.46"m/s"#

(b). #13.14"m/s"#

(a).

#v=u+at#

#9.3=u+(2.4xx1.6)#

#u=5.46"m/s"#

(b).

#v=9.3+(2.4xx1.6)#

#v=13.14"m/s"#