Note: payload is not being put into orbit; just delivered. what is the minimum kinetic energy needed to launch a payload of mass m to an altitude that is one earth radius, re, above the surface of the earth (the payload will then fall back to earth)? (note that me is the mass of the earth.)

Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2