An astronaut and his space suit have a combined mass of 157 kg The astronaut is using a soke
repair a solar panel on the International Space Station. When the tether connecting the astronaut to the space
station becomes unattached, the astronaut, still holding the tool kit, starts to float away at 0.2 mis
a) Calculate how far from the space station the astronaut will be after minute. Show your calculations and
include units in your answer
b) Calculate the momentum of the astronaut holding the tool kit as the astronaut floats away. Show your
calculations and include units in your answer.
The astronaut decides the only way to change his motion and move back toward the space station is to throw
the tool kit.
c) Identify the direction the astronaut must throw the tool kit: toward the space station or away from it. Use
the law of conservation of momentum to explain how throwing the tool kit may return the astronaut to the
space station
d) Calculate the velocity with which the astronaut must throw the tool kit in order to float back toward the
space station at 0.1 m/s. Show your calculations and include units in your answer.

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is transformed ⇒ as it changes into other forms of energy.

Jason and mia are both running in a race. as they approach the finish line, you being the physicist that you are decide to time how long it takes them to reach the end of the race. when you start your stop watch (you can take this as time t = 0 s) you notice that mia is an unknown distance d ahead of jason and both are moving with the same initial velocity v_0. you also notice that jason is accelerating at a constant rate of a_j, while mia is deaccelerating at a constant rate of -a_m. jason and mia meet each other for the first time at time t = t_1. at this time (t = t_1) jason's velocity is two times that of mia's velocity, meaning v_j (t_1) = 2v_m (t_1). a) draw the position vs. time graph describing mia's and jason's motion from time t = 0 to time t = t_1. clearly label your axes and initial conditions on your graph. b) draw the velocity vs. time graph describing mia and jason's motion from time t = 0s to time t = t_1. clearly label your axes and initial conditions on your graph. c) how long from when the stop watch was started at t = 0s did it take mia and jason to meet? express your answer in terms of know quantities v_0, a_m, and a_j. d) when the stop watch started at time t = 0s, how far apart, d, were mia and jason? express your answer in terms of know quantities v_0, a_m, and a_j.