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?

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation