A 43.1 kg object is dropped from a height of 75.5 m. Compute its velocity just before hitting the ground. Give positive rounded values, without unit.

Two skaters, one with mass 50 kg and the other with mass 70 kg, start from rest and slide down identical frictionless ramps. Who reaches the bottom with a higher velocity?

Find the work

done

by the spring

force, when

the spring

is compressed

from

its

initial length

of 4 m to 1 m, if

Two oscillating particles can have the same oscillation amplitude even if they have different frequencies.

One throw a stone vertically with the initial velocity 75.6 m/s. Calculate the maximum height reached by the stone. Give rounded values, without unit.