Two boats start together and race across a 42-km-wide lake and back. Boat A goes across at 42 km/h and returns at 42 km/h. Boat B goes across at 21 km/h, and its crew, realizing how far behind it is getting, returns at 63 km/h. Turnaround times are negligible, and the boat that completes the round trip first wins.Which boat wins? (Or is it a tie?) By how much? What is the average velocity of the winning boat?

Q: A supersonic car (SSC) has a mass of 9615 kilograms on Earth. The SSC has a fuel consumption rate of…

A:

Q: A bus covers a distance of 180 km b/w two cities in 5 hr. What is the average speed of the bus ?

A: Write the given values with the suitable variables. d=180 kmt=5 hr Here, d is the distance and t is…

Q: wide

A: Given: The vertical distance covered by the stuntman = 1.9 m The gap between the buildings = 4.2 m…

Q: Two boats start together and race across a 60-km-wide lake and back. Boat A goes across at 60 km/h…

A: Step 1: Given that : Width of river (L) = 60 kmCrossing Velocity of boat  A is :VA1​=60…

Q: The F-35A, one of the U.S. Air Force's latest fifth-generation fighter was taken 160 km away from…

A: To solve this problem, we can use the equations of motion and kinematics. We assume that the F-35A…

Q: Two boats start together and race across a 40-km-wide lake and back. Boat A goes across at 40 km/h…

A: velocity of boat A while going across the lake = 40 kmhrvelocity of boat A while returning = 40 kmhr…

Q: Towns A and B in the figure below are 80.0 km apart. A couple arranges to drive from town A and meet…

A: Given information: The distance between the town “A” and “B” (d) = 80.0 km The time taken by the…

Q: In the classic book by Jules Veme, Phileas Fogg travels around the world in 80 days. Leaving London,…

A: Given data: Time (t) = 80 days Radius of the earth (r) = 6.38 × 106 m/s Starting from London and…

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

A:

Q: I have no idea to how to start to this question: Wags (a dog) decides to go on a journey. He begins…

A:

Q: A dog slips out of its collar while going for a walk and runs away at full speed.  By the time the…

A:

Q: A train is moving at 40 m/s as it passes another train moving on a parallel track. The other train…

A: d1=d2v1t=u2t+0.5at2240 m/st=0 m/st+0.55 m/s2t2t=16 s Thus, the time taken to catch up the first…

Q: A grandfather is waiting for his grandchild, pacing back and forth in a straight line in a long…

A: Given:Grandfather walks from a given pooint as follows:A = 12 paces East, thenB = 5 paces West,…

Q: A girl on a bicycle takes 15.4 s to ride half way around a circular track of radius 19.0 m (see the…

A: a)The average speed is,

Q: A car moves along a straight road. It moves at a speed of 50 km/hr for 4 minutes, then during the…

A: This question belongs to kinematics.

Q: A juggler is practicing tossing balls on a train which is moving north at 30 m/s. She tosses a ball…

A:

Q: Two boats start together and race across a 72 km wide lake and back. Boat A goes across at 72 km/h…

A: Width of the lake L=72 km

Q: In downtown Chicago, the east-west blocks are 400 ftft long while the north-south blocks are 280…

A: The total distance in the north of south is

Q: A major league pitcher throws the ball at a speed of 97.5 ft/s. How high would the ball go if thrown…

A: Given: The initial speed of the ball is 97.5 ft/s. Introduction: When a body is thrown against…

Q: A seagull flies at a velocity of 8.5 m/s relative to the air straight into the wind. vSA = 8.5 m/s…

A: Given:- Velocity of the bird with respect to air is vSA=8.5 m/s Time  t=23 min  =23 min×60 s1 min…

Q: Manila and General Santos are about 1000 miles apart. A car leaves Manila to General Santos at the…

A: Given data:  The car and train travel towards each other  Total distance (d) = 1000 mi Speed of the…

Q: An automobile travels along the circular path of radius 35 m such that its speed is increased by a =…

A:

Q: Question 6 3 pts At t = 0, a car is going 9 ft/s and is 259 ft from the start of the road. The…

A:

Q: Two boats start together and race across a 60-km-wide lake and back. Boat A goes across at 30 km/h…

A: The width of the lake,   Speed of boat A when it goes across the river,   Speed of boat A when it…

Q: A girl on a bicycle takes 12.2 s to ride half way around a circular track of radius 20.0 m (see the…

A: (a) Write the expression for average speed

Q: You throw a tennis ball straight up. It takes 7.0 seconds to go up and then return to your hand. How…

A:

Q: On a particularly busy workday, I might need to drive back and forth between ASUN’s Newport and…

A: Given: Distance between ASUN’s Newport and Jonesboro (d) = 38 miles. Time to taken to complete the…

Q: A car leaves city A and goes to city B at 45 km / h. 20 minutes later another car leaves city B and…

A:

Q: A single-engine air plain starts its engine at one end of the runway. It accelerates at a constant…

A: Given, velocity v=38 m/s time t=20 s

Q: The infamous chicken is dashing toward home plate with a speed of 5.7 m/s when he decides to hit the…

A: (a) The magnitude of acceleration is given by,

Q: The Antarctic expedition drives their snowmobiles 185 miles south from their camp. Then they turn…

A:

Q: Two boats start together and race across a 78 km wide lake and back. Boat A goes across at 78 km/h…

A:

Q: As a city planner, you receive complaints from local residents about the safety of nearby roads and…

A:

Q: A treasure hunter follows a map moving 25 km [N], 37 km [W 37 degrees S], 63 km [E 65 degrees S] and…

A: Average speed of the hunter is u = 45 km / hr

Q: Two boats start together and race across a 62-km-wide lake and back. Boat A goes across at 62 km/h…

A: a) The expression to determine the time taken by boat A to cross the lake is,…

Q: Two boats start together and race across a 52-km-wide lake and back. Boat A goes across at 52 km/h…

A:

Q: In downtown Chicago, the east-west blocks are 400 ft long while the north-south blocks are 280 ft…

A: Given data: The distance from north to south is, d1= 280 ft The distance from east to west is, d2=…

Q: A car travels East from point A to B in 3 hours and returns back passing point A and stopping at…

A: Time taken to reach from point A to B    TAB = 3 hours Distance between points A and B   DAB =  150…

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.