A 70kg teacher (including the parachute) is skydiving! As the parachute opens,
the system experiences a 1000N drag.
How many forces are acting on the system?
2
What is the magnitude of the net force on the system?
N
What is the magnitude of the system's acceleration?
m/s2
Describe the system's speed:
decreasing

Adiver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. he then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. the net external torque acting on the diver is zero. what is his moment of inertia in the tuck position?

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.