The work performed as a function of time for a process is givenby W= at3 where a=2.4 J/s3 What is theinstantaneous power output at t = 3.7 s?
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As a driver steps on the gas pedal, a car of mass 1100 kgaccelerates from rest. During the firstfew seconds of motion, thecar's acceleration increases with timeaccording to the followingexpression.
a = (1.16 m/s3)t -(0.210m/s4)t2 +(0.240m/s5)t3
The position of a SHO as a function of time is givenby x =3.6 cos(5 Ï t + Ï / 6)where tis in secondsand x in meters.
A 3.7 kg object is subjected to two forces,~ F1 = (1.5 N) Ëi + (-1.8 N) Ë| and ~ F2 =(4.3 N) Ëi + (-11.4 N)Ë|. The object is atrest at the origin at time t = 0.What is the magnitude of the objectâs ac-celeration?Answer in units of m/s2.What is the magnitude of the velocity at t =2.4 s ?Answer in units of m/s.What is the magnitude of the objectâs positionat t = 2.4 s ?Answer in units of m.