NAME _____________________________________________ SCORE
Acceleration due to gravity on mars is around 3.7m/s/s
You are to watch The Martian in class and complete the following questions; this will count as a test grade for the 4th quarter.
All work and substitution with units must be shown for full credit.
If you miss a day of class, you are still expected to complete questions associated with that day. This packet is due Monday May 20 2019, 10 points will be deducted for each day it is late. If you are absent that day I expect an email please.1. 3:23 Convert 700 grams to kilograms. [3 points]
2. 4:21 If it took a net force of 8600 Newtons to tip the shuttle with a mass of 5200kg, what would be the acceleration produced? [3 points]
3. When the shuttle takes off from the martian surface it is accelerating upward, please draw a free body diagram qualitatively showing take off. [3 points]
4. If 82 kg Mark Watney was walking east at 1.6 m/s how fast would a 2.7kg antenna need to be moving westward if both the antenna and Mark Watney came to a complete stop after colliding. (Think momentum) [4 points]
5. Find Watneys weight if he has a mass of 82 Kg. a. Weight on earth? [3 points]
b. Weight on mars? [3 points]
6. 26:23 When Watney “blew himself up” his body was accelerated at 24 m/s/s. With a mass of 82Kg what would the net force required to attain this acceleration? [3 points]
7. 32:15 The satellite used to find Watney was the MRO which has a mass of a 302 kgs. The MRO is moving at 980 m/s and is at an altitude of 382km. Assuming acceleration due to gravity on mars is 3.2m/s2 at that altitude.
a. Find The gravitational Potential energy. [3 points]
8. 35:28 When Mark is looking at the map for the Ares 4 mission and claims he needs to travel 3200km is he referring to the distance or displacement? Explain the difference between the two using pictures and words. [3 points]
9. 39:55 If Mark Watney drove 35 km East in 2 hours then turned South and drove 39 km in 2 hours what was his speed and velocity?
a. Draw to scale with all necessary values (5km =1cm) [3 points]
b. Speed [3 points]
c. Velocity [3 points]
10. 47:09 When Mark connects the external power supply it provides a 13 Amp current with a potential difference of 110 volts.
a. What is the Resistance of the circuit? [3 points]
b. How many electrons pass through any given point in the circuit in 4 minutes? [3 points]
11. 48:52 If it takes 32 minutes for a signal to make a round trip to Mars and back, how far away is Mars? (hint: What kind of wave do you think was sent?) [3 points]
12. 52:46 If the broadcasting frequency for the rover and the HAB was 2.6 GHz what would be the wave length? Where could this be found on the EM spectrum? [3 points]
13. 1:02:48 Welp it looks like the HAB just became a projectile. If the HAB took off at an angle of 15 degrees and an initial velocity of 31 m/s calculate the following. (don’t forget the g value for mars is 3.7m/s/s)
a. Vx [3 points]
b. Vy [3 points]
c. Time in the air? [3 points]
d. Height (dy) [3 points]
e. Range (dx) [3 points]
14. 1:08:10 the Hermes is seen rotating at about 25m/s and having a radius of about 62 meters. a. Find the centripetal acceleration produced by the spin? [3 points]
b. How much centripetal force would space nerd Johannsson experience if she had a mass of 54kg? [3 points]
15. 1:16:50 in the scene when the rocket with the food took off the camera was approximately 1831 meters away. How long would it take the sound wave from the engines to reach the camera? [3 points]
16. 1:21:52 Geez I know what you all were thinking, those TVs must be wired in parallel. They are! If we have 3 TVs with a resistance of 142 ohms wired in parallel with a 110 volt potential
difference.
a. What would be the equivalent resistance for this circuit? [3 points]
b. What is the current running through just one of the tvs? [3 points]
c. How much power are the 3 TVs consuming ? [3 points]
17. 1:22:17 yes indeed that is the childish Gambino in the super computer lab. a. Describe why it would be so cold in the super computer room. [2 points]
b. Complete the following relationships [4 points]
R R R R
length area resistivity temp
18. 1:24:13 When The Childish Gambino bounces the pen off of Teddy’ s head it compresses a spring in the pen. If the spring constant is 153 Newtons/meter and is compressed 1.2
centimeters…..
a. What would be the force on the spring ? [3 points]
b. What is the potential spring energy in the pen when compressed? [3 points]
19. 1:33:13 Marks Drill uses 3.21 amps to operate. If it takes 42 minutes to drill all the holes how much charge was transferred during this time. [3 points]
20. 1:40:51 An EM wave with a frequency of 1.2 x 10^16 Hz hits Mark Watneys Solar panels and liberates and electron. When this electron was liberated it went off with 3 x 10 ^ -18 Joules of kinetic energy.
a. What is the energy of the Photon ? [3 points]
b. How much energy was needed to liberate the electron? [3 points]
c. What kind of Photon wave was it? [3 points]
d. What was the wavelength of this wave? [3 points]
21. 1:44:07 The MAV needs to get lighter Mark struggles to take off the nose cone but is able too? On earth that nose cone was almost 900lbs !!! If the nose cone has a mass of 400 kg what would be its weight on mars. I want answers in both newtons and pounds
(Remember 1 pound = 4.45 newtons) [3 points]
22. 1:53:13 12 light minutes? How far and light travel in 12 minutes? [3 points]
23. Pop apart kinda? When the Hermes tries to slow down by releasing the atmosphere they are essentially throwing mass forward to help push them backward. Assume the Hermes has a mass of 1.6 million kilograms and was initially traveling at 1700 m/s
a. What is the Hermes momentum [3 points]
b. If the Hermes slowed to a snail like 325 m/s what was the impulse experienced? [3 points]
c. If the deceleration took 3.1 seconds what was the net force acting on the hermes during the maneuver? [3 points]
d. If the mass of the air leaving the Hermes was 21,000 kg how fast did it need to move when escaping in order to create this impulse? [3 points]
