What should you do when a crate is too heavy to be lifted by the pulley?

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

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

(**i would really appreciate if this was answered soon** ) which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?