Exam 1 Practice Questions

Question 1

Acceleration

Answer 1

rate of change of velocity with respect to time
Linear/Angular
Equation: delta v / delta t
Unit: m/s^2

Question 2

Maximizing Mechanical power actually means

Answer 2

performing mechanical work very fast

Question 3

A constant non zero acceleration of a body means that:

Answer 3

velocity is changing

Question 4

When you are moving in a negative direction, a constant negative acceleration means that you are:

Answer 4

Speeding up

Question 5

When moving through the air and neglecting the influence of air resistance the horizontal acceleration of a body is zero

Answer 5

true

Question 6

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.

Answer 6

False

Question 7

Strain energy is dependent on two things

Answer 7

Deformation and stiffness

Question 8

Units for U

Answer 8

Mechanical work = joules

Question 9

PE

Answer 9

energy due to position

Question 10

Mechanical work is defined as the product of force and the resulting

Answer 10

displacement

Question 11

Describe negative work

Answer 11

baseball player catching a ball and his glove displaces toward him.