Exam 1 Practice Questions Flashcards
Acceleration
rate of change of velocity with respect to time
Linear/Angular
Equation: delta v / delta t
Unit: m/s^2
Maximizing Mechanical power actually means
performing mechanical work very fast
A constant non zero acceleration of a body means that:
velocity is changing
When you are moving in a negative direction, a constant negative acceleration means that you are:
Speeding up
When moving through the air and neglecting the influence of air resistance the horizontal acceleration of a body is zero
true
when a professional player hangs in the air they actually change the position of their extremitites so that the trajectory of the COG flattens at the top of the jump.
False
Strain energy is dependent on two things
Deformation and stiffness
Units for U
Mechanical work = joules
PE
energy due to position
Mechanical work is defined as the product of force and the resulting
displacement
Describe negative work
baseball player catching a ball and his glove displaces toward him.