Two cars approach each other on a straight and level road.  Car A is traveling at 75 km/h, due north and car B is traveling at 45 km/h, due south. Both velocities are measured relative to the ground. What is the velocity of car A relative to an observer in car B ?

When they are apart by 425m, the famous twins Isaac and Albert Neuman begin approaching each other. Isaac is riding a bicycle at a speed of 12.7 m/s and Albert is running at a speed of 3.8 m/s. How long does it take for them to meet, and how far will each have traveled?

Vladimir is traveling South at a steady 70.0 mi/hr (31.3 m/s) on a straight portion of Route 3. The car directly ahead of him is also traveling at 70 mi/hr. Vladimir is keeping what he feels is a safe distance from the car directly ahead of him, 35.0 m (roughly 7 car lengths). Suddenly at t = 0, having noticed a posted speed limit of 40.0 mi/hr (due to road construction), the driver of the car ahead slams on his brakes and begins to slow down at a steady rate of 10.0 "m/2 . Once he has slowed down to 40.0 mi/hr (17.9 m/s), he plans to maintain this constant speed. Suppose that it takes Vladimir 1.00 second to notice that the car ahead has slowed down, and another 2.00 seconds to effectively apply his brakes. Also suppose that, once he has applied his brakes, Vladimir's car slows down at a steady rate of 10.0 X=0 X=35.0 m 16. Assume, for the sake of argument, that no collision occurs. What distance will Vladimir's car travel while he is in the process of slowing down to 40.0 mi/hr? A.…

You have exactly 5 minutes 25 seconds to get to your next class on time and that classroom is 408 m east of where you are right now. First you run to your dorm room at an average velocity of 4.48 m/s to the south to pick up your calculator and your dorm room is 470 m south of where you were initially. What average velocity (magnitude only) do you now need to run from your dorm room to your classroom to arrive exactly on time?     1.92 m/s     4.48 m/s     2.83 m/s     2.70 m/s

The Starship Enterprise returns from warp drive to ordinary space with a forward speed of 57 km/s. lo the crow's great surprisc, a Klingon ship is 150 km directly ahead, traveling in the same direction at a mere 21 km/s. Without evasive action, the Enterprise will overtake and collide with the Klingons in just about 4 5s 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 Hint: Draw a position versus time graph showing the motions of both the Enterprise and the Klingon ship. Let æn - 0km be the location of the Interprise as it returns from warp drive I low do you show graphically the situation in which the collision is "barely avoided"? Once you decide what it looks like graphically, express that situation mathematically. Express your answer to two significant figures and include the appropriate units. a = μA Value m s² Review |…

14.  You are running north at 5.90ms. Let’s call you Jogger A. Jogger B is currently ahead of you and is also jogging north at 1.88ms. From your frame of reference, what is the speed and direction of Jogger B?Assume that north is in the positive direction and south is in the negative direction.   −4.02ms   −7.41ms   −1.29ms   −5.47ms   None of these is correct.

A spacecraft is traveling with a velocity of v0x = 6710 m/s along the +x direction. Two engines are turned on for a time of 796 s. One engine gives the spacecraft an acceleration in the +x direction of ax = 2.31 m/s2, while the other gives it an acceleration in the +ydirection of ay = 8.98 m/s2. At the end of the firing, what is a) vx and b) vy?

Johnny comes across a river that is 252 meters wide. He sees that the water flows eastward with a uniform velocity of 1.10m/s. Johnny sees his friend Sarah start her boat at point A on the south bank and start to cross the river to point B which is on the other side. Suppose the trip takes 3 minutes. Figure out the velocity of sarah's boat with respect to a) Johnny who is stationary on the ground b) A floating goose that's moving with the water. N B W-E S Vriver = 1.1 m/s A 252 m

You travel from point A to point B in a car moving at a constant speed of 70 km/h. Then you travel the same distance from point B to another point C, moving at a constant speed of 90 km/h. Is your average speed for the entire trip from A to C 80 km/h? Explain why or why not.

Two locomotives 70 kilometers apart are travelling on the same track towards each other, Engine A moves at 22 kilometers per hour east and engine B moves at 13 kilometersper hour west. At the instant both trains begin moving, an annoying mutant fly beginsflying from engine A towards engine B at 33 kilometers per hour . The instant it touchesB, it turns around and flies back. It goes on this way until the two locomotives collideand the mutant fly is finally squashed. So, before its untimely demise, a) what is the total distance the fly flew? b) the time it took till  it was eliminated and c) the average velocity of the fly? how can i find this please