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A crate on a motorized cart starts from rest and moves with a constant eastward acceleration of a = 2.20 m/s2. A worker assists the cart by pushing on the crate with a force that is eastward and has magnitude that depends on time according to F(t)=(5.40N/s)t.

Respuesta :

Answer:

Explanation:

Given

acceleration a =2.2 m/s^2

Force F(t) is given by

F(t)=5.40 t N/s

Power supplied by this force at different time t is given by

Power[tex]=F\cdot v[/tex]

velocity at any instant t is given by

v=at

Power[tex]=5.40 t\cdot 2.2 t[/tex]

Power[tex]=11.88 t^2[/tex]

at t=1 s

Power =11.88 W

at t=2 s  

Power[tex]=11.88\times 4=47.52[/tex]

at =4 s

Power[tex]=11.88 \times 16=190.08[/tex]

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