A crane in New York City was holding a 20,000 kg beam when the cable holding the beam broke. The beam free fell for 3 seconds before impacting the ground. Acceleration due to gravity is
9.8m/s2. What was the velocity of the beam upon impact?

Asuppose a suitcase has a mass of (m) 30 kg and a net force (n) of 10 kg*m/s. what is the acceleration rate of the suitcasein m/s? show your work to support your answer.

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)