1) a 3kg particle with displacement r= (2t+3)i + 6j + 3t^2k
a 4 kg particle with displacement r= 2jsin(pi t) + (1-2t^2)k,
find the net force on the system.
2) consider the equation:
t= wo/a {-1 + sqrt(1+2 a theta/wo^2)}
i) is this dimensionally correct?
ii) what happens to it for wo=0?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Suppose that a mass of 2 kg is attached a spring whose spring constant is 50. the system is damped such that b = 12 . the mass is set in motion with an initial velocity of -8 m/s at a position 0 meters from equilibrium. set up and solve a differential equation that models this motion. write your solution in the form a cos ( ω t − α ) where α is a positive number. use your solution to fill in the information below: what is the amplitude of the motion? what is the value of ω ? what is the phase shift?

Carbon tetrachloride (ccl4) is ionic or convalent