Question

A 20kg cart is pushed with a force of 175N at an angle of 25degrees. if it starts from rest, how far does it travel in 7 seconds?

Answer 1

if i am true ...
Equation of conservation
\[Ec _{A}+W(F)=EC _{B}\]
\[1/2mv _{A}^{2}+Fdcos25=1/2mv _{B}^{2}\]
\[Ec _{A}=0\]
\[V _{B}^{2}=(2m)(Fdcos25)\]
and continue ......

Answer 2

the effective force in the direction of motion is fcos25.
we know that f=ma; a=f/m;
d=ut + a/2*t^2
as initial velocity is zero , u is 0.
calculate d from the above equation.