In another dream, you find yourself in the middle of outer space with your best friend and his evil twin. They look identical but you know the evil twin has a much lower mass since he is only part human (and part machine.) Without harming either of them, how can you determine which one is the evil twin? Consider Newton’s Second Law and inertial mass.

My dear hand written solution is not allowed.

2. For this series of 4 questions, a man sits in the chair which is pin-connected to the 10-m frame BC. Frame BC rotates counterclockwise. Your final goal is to determine the magnitude of the support force N exerted by the chair on the man at the instant 0 = 30°. But before that, you need to answer some other questions. Please pay attention: the numbers may change from problem to problem since they are randomized. 2) If at this instance he has a speed of 6.5 m/s, which is increasing at 0.4 m/s², determine the magnitude of his total acceleration in m/s². Your answer must include 2 places after the decimal point. Your Answer: Answer 10 m B

Considering both special relativity and gravity, how much does Alice age if Julie ages 1 year?

We will see that Newton's laws of classical physics apply only in certain "inertial" frames of reference.  As an example, consider being in an airplane on a long trans-Pacific flight.  It is dark, the shades are drawn, and all of your fellow passengers are quietly asleep, watching movies, or reading.  You however, being a newly trained physicist, want to do an experiment to see how fast the plane is flying. With the tools you have (no GPS!) which one of the following is true.     If you toss something to a friend down the aisle, and they toss it back to you, there will be a difference in the speeds in the two directions because of the speed of the airplane.     Look at the tip of the coffee's liquid surface in your cup. It tips more the faster you go.     There is no experiment we can do.      Drop something.  It will not fall straight down because the plane is moving On a plane flat surface with "up" given as  +y and  "right" given as +x, we add two…

1. Taking north as positive and south as negative for all reference frames, suppose Mayor Adams is riding a southbound train to New York City traveling at 40 m/s relative to the ground, while Governor Hochul is riding a northbound train to Albany at 33 m/s relative to the ground. A) What is the velocity of Mayor Adams in Governor Hochul's reference frame (i.e. in the reference frame where Governor Hochul isn't moving)? B) What is the velocity of Governor Hochul in Mayor Adams reference frame? C) To his surprise Mayor Adams observes a groundhog running along the aisle towards the back of the train with a speed of 2 m/s relative to the train. What is the velocity of the groundhog in Governor Hochul's reference frame? D) What is the groundhog's velocity in the reference frame of someone standing at the train station? E) What is its velocity in Mayor Adams's reference frame? F) What is its velocity in the groundhog's frame? 30 10 ft. 5 ft. 15 ft.

Let's say we have a M1 and M2. Let's just say. Let's examine this hypothetical situation. The first mass would be 1.50 kg and the second mass would be 2.00 kg. These two masses would then be separated by a length or we should say a distance of this L = 2.50 m. Let's say we want to place a third mass (immaterial mass) in the middle of the two masses, such that there would be no net force. Find this specific place where this would occur, and to make it easy, find the distance from the first mass towards this third mass

1) Calculate the interval As 2 between two events with coordinates (x1 = 50 m, y1 = 0, z1 = 0, t1 = 1 us) and (x2 = 120 m, y2 = 0, z2 = 0, t2 = 1.2 µs) in an inertial frame S. 2) Now transform the coordinates of the events into the S0 frame, which is travelling at 0.6c along the x-axis in a positive direction with respect to the frame S. Hence verify that the spacetime interval is invariant.

George and Theresa, married for over 50 years, boast to their friends that they are physically attracted to each other and can prove it using the laws of physics. They enlist you to do the calculations. Prove to the world that they indeed are physically attracted to each other, at least gravitationally. Assume that George weighs 170 lb, Theresa weighs 130 lb, and that they are standing side by side (body centers 18 inches apart). What is their attractive force?

The Starship Enterprise returns from warp drive to ordinary space with a forward speed of 51 km/skm/s . To the crew's great surprise, a Klingon ship is 140 kmkm directly ahead, traveling in the same direction at a mere 30 km/skm/s . Without evasive action, the Enterprise will overtake and collide with the Klingons in just about 6.7 ss . The Enterprise's computers react instantly to brake the ship. What magnitude acceleration does the Enterprise need to just barely avoid a collision with the Klingon ship? Assume the acceleration is constant.