Modern Physics> A body of mass 2kg travels according to t...

A body of mass 2kg travels according to the law x(t)=pt+qt^2+rt^3 where p=3m/s q=4m/s^2 and r=5m/s^3.The force acting on the body at t=2s is

krishna , 8 Years ago

Grade 11

1 Answers

Shailendra Kumar Sharma

Force acting on a body is given by F=ma
or $F = m\frac{\partial^2 x}{\partial t^2}$

Now x=3t +4t²+5t³

$v = \frac{\mathrm{dx} }{\mathrm{d} t}$

v= 3+8t+15t²

$a = \frac{\mathrm{dv} }{\mathrm{d} t}$

a=8+30t
Now a at 2 sec will be 68
so force acting on the object will be ma =136N

Last Activity: 8 Years ago

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Modern Physics> A body of mass 2kg travels according to t...

A body of mass 2kg travels according to the law x(t)=pt+qt^2+rt^3 where p=3m/s q=4m/s^2 and r=5m/s^3.The force acting on the body at t=2s is

krishna , 8 Years ago

Shailendra Kumar Sharma

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