You are a construction worker standing still on 12th Ave N in Fargo, and you watch a minivan drive past at 25 mi/hr eastward. A kid in the back throws a ball at his brother in the front seat at 19 mi/hr. How fast does the ball move, as observed by you? (Positive indicates east, negative indicates west.) ? How fast does the ball move, according to the kid who threw it?  If instead the kid in the front seat throws a rock at the kid in the back seat at 19 mi/hr, how fast would you observe the rock to travel?

Q: John and Jane are standing beside a straight road and start their stopwatches at the same time. Jane…

A: Given:  The velocity of the car is v=27.80 ms. The time on John's stopwatch is t1=24 s. The time on…

Q: Two cars are moving towards an intersection. One car is 190 meters north of the intersection and…

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Q: You have an old American Mustang that you have shipped to Austria. The speed limit on the autobahn…

A: The speedo meter measures the Instantaneous speed of the vehicle. The speed limit on the autobahn in…

Q: Two cars leave an intersection, one 17 minutes after the other. The first car, A, travels north at…

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Q: Two ants pass each other one is moving along the negative x axis and one is moving at 45 degrees to…

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Q: ou are driving along at a constatnt speed of 26 m/s and you look down at your phone to read a text…

A: Given: The speed of the car is 26 m/s. The time interval is 2.5 s. The car is moving at a uniform…

Q: A Ford passes a Toyota on the road (both vehicles are traveling in the same direction). The Ford…

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Q: PROBLEMS 11.1+ Speed addition. Darnell stands in a railroad coach that moves at speedc relative to…

A: We will answer this question using formula for adding relativistic velocities. The steps are as…

Q: If you drive from Santa Cruz to San Jose, and back to the same place you started in 1.5 hours. What…

A: Given: Let, the time to drive from Santa Cruz to San Jose is t1, and the time taken back to the…

Q: Tony stark happens to be standing beside thor as thor drops Mjolnir off of stark tower(425m). Tony…

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Q: Just as the traffic light changes to green, a Mustang drives through the intersection at a constant…

A: Given data:  Constant velocity of Mustang (V1) = 14.2 m/s, towards North Initial velocity of Camaro…

Q: If you drive from Santa Cruz to San Jose, and back to the same place you started in 1.5 hours. What…

A: Average Velocity of an object is its total displacement divided by total time taken.  Displacement -…

Q: A van is moving at a constant speed of 25m/s and passes a car sitting on the side of the road. 3…

A: constant speed of van (v) = 25 mstime after which the car begins to move (t1) = 3 seconds Initial…

Q: An automobile moving with 95 km/hrs is passing a train that is 1.10 km long. The speed of the train…

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Q: A car starting from rest picks up at a uniform rate and passes three electric posts in succession.…

A: Given information: The distance between the poles = 360 = S1-2 = S2-3 The time taken to travel from…

Q: A runner is moving with a speed of 2.68[m/s]. How long will it take the runner to complete a 5.0[km]…

A: The expression for find time taken by the runner to complete the race is t=dv

Q: A car rounds the clover-leaf at 13 "/s as it enters the 400 meter-long merge zone. a) What…

A: Answer:-  + 0.990 m/s2 Given  Initial velocity (u) = 13 m/s  Final Velocity (V) = 31 m/s  Distance…

Q: A Ford passes a Toyota on the road (both vehicles are traveling in the same direction). The Ford…

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Q: A space object is launched into the atmosphere at a constant velocity of 30 mi/s. A resident stands…

A: Given data: The initial speed of object is u=30 mi/s. The distance of launching pad is x=60 mi. The…

Q: Your piece of a masterpiece, Honda Civic is doing well on 680. Especially, when Sheriff's car just…

A: Solution: Given: 1 mph = 0.44704 m/s 1 ft = 0.3048 m v = speed of car = 62 mph = (62 x 0.44704) m/s…

Q: Two cars are moving towards an intersection. One car is 150 meters north of the intersection and…

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Q: ling along the curved road with a radius of 15 car A is accelerating in the direction of its peed of…

A: Given: radius, r=150 m VA=72 kph VB=54 Kph

Q: While driving south on hwy 400, Jim gets stuck travelling at 1.9 m/s behind a slow truck. He finally…

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Q: A student begins at rest and then walks north at a speed of v1 = 0.55 m/s. The student then turns…

A: Given: Speed v1 = 0.55 m/s along north direction Speed v2 = 0.53 m/s along south direction Taking…

Q: Susan is 2.25 m [W] of the park and her good friend, Mary, is 1.76 m [E] of the park. If it took…

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Q: You are driving your car downtown from the beach, but you realize that you need to stop for food.…

A: Considering north direction to be upwards, west will be to the left of northSo, initially the person…

Q: 5. A particle moved along the x axis with a constant acceleration of -35.0 meters per second…

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Q: 1. I decided to show the kid in the previous example (h=15 m) how we used to do it back in my day. I…

A: Law of conservation of energy: It states that energy remains conserved and only transformed from one…

Q: 2. Car A is traveling east along HWY 7 at a constant speed of 50 km/h and passes the intersection of…

A: Car A traveling towards East with constant speed 50 km/hr. Car B moving towards south with constant…

Q: A Ford passes a Toyota on the road (both vehicles are traveling in the same direction). The Ford…

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Q: 2. You decide to enjoy the lovely Santa Barbara weather by taking a ride in your car along the…

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Q: Christopher watches a stick float downstream in a river and notices that it moves 15 m [El in a time…

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Q: A cannon is on the edge of a vertical cliff 50 m high. The cannon then fires horizontally giving the…

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Q: Mike and Josh, two bicycles from towns d = 24 kilometers apart, set off in the same direction at the…

A: Given: Mike and Josh are moving in opposing directions, with the wind continually blowing in Josh's…

Q: Moving sidewalks are installed every other 50 meters along the entire stretch of an airport walkway.…

A: The given values with suitable variables are listed below. Here, d denotes the distance of…

Q: At noon, Fred is driving south on Highway 1, 50 miles north of its intersection with Highway 2. He…

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Q: When they are apart by 425m, the famous twins Isaac and Albert Neuman begin approaching each other.…

A: Let after time t Issac and Albert meet. Given: Speed of Issac is 12.7 m/s. Speed of Albert is 3.8…

Relative Velocity

It is a measurement of an object with regards to the other object which is moving or stable or stationary. For example, if we are traveling in a bus and the bus is moving at speed of 50km/hr, then our speed is according to the nearby passenger on the bus is zero. According to them, we are not moving. But if one person standing on the ground or road observes us from outside of the bus, according to him we are moving at a speed of 50km/hr and the bus is also moving at a speed of 50km/hr. Now, the motion is recognized by the observer, it depends on a frame of reference or observer. This is motion called relative motion.