A woman can row a boat at 7.60 km/h in still water. (a) If she is crossing a river where the current is 3.80 km/h, in what direction must her boat be headed if she wants to reach a point directly opposite her starting point? Express your answer as an angle with respect to the line perpendicular to the river, positive if down the river. (b) If the river is 7.60 km wide, how long will she take to cross the river? (c) Suppose that instead of crossing the river she rows 3.80 km down the river and then back to her starting point. How long will she take? (d) How long will she take to row 3.80 km up the river and then back to her starting point? (e) In what direction should she head the boat if she wants to cross in the shortest possible time, and (f) what is that time?

Q: An aircraft maintains a heading of due north. if the plane has a ground speed of 220 km/hr at 20…

A: Given,

Q: A jet airliner moving initially at 538 mph (with respect to the ground) to the east moves into a…

A: When the jet airliner moves into a region where the wind is blowing, Velocity of the plane in…

Q: find the speed of the current.

A: resultant can be added using parallelogram law

Q: A large oil tanker proceeds from Ivory Coast to Monrovia via the Port of Cape Palmas. A small tanker…

A: The displacement is the straight length between initial and final position of traveler and the…

Q: An airplane is flying on a compass heading (bearing) of 300° at 335 mph. A wind is blowing with the…

A: Given: The speed of the airplane is 335 mph. The direction is 300 degrees. The speed of wind is 50…

Q: A boat crossing a river can move at 5 m/s with respect to the water. The river is flowing to the…

A:

Q: The Gulf Stream can flow as fast as 3.6 m/s directly north. A ship in the current has a cruising…

A: Given:    Velocity of river, v1 = 3.6 m/s (North)   Speed of ship, v2 = 10 m/s  To determine the…

Q: You drive 7.50 km in a straight line in a direction 15° east of north. (a) Find the distances you…

A:

Q: boat aims to cross a river as fast as possible. The river flows at 3 m/s  and the boat’s speed is 5…

A:

Q: A kayak on a lake is moving at a constant speed of 4.2 m/s in a direction 43.3° north of west. After…

A:

Q: The stream of a river is flowing with a speed of 2 km/h. A swimmer can swim at a speed of 4 km/h.…

A:

Q: A golfer takes two putts to get his ball into the hole once he is on the green. The first putt…

A: A golfer takes two putts to get his ball into the hole once he is on the green. The first putt…

Q: A river has a steady speed of vs. A student swims upstream a distance d and back to the starting…

A: For finding time in each case, find the net speed in each case and then use time formula.

Q: An airplane flies north relative to the ground in a 40 km / h wind to the east. If the speed of the…

A: Given:Vp = 80 km/hr due north Vw = 40 km/hr towards eastFind the speed relative to the air.Now,The…

Q: A vehicle enters a corner moving at 20.0 m/s north then leaves the corner moving at 20.0 m/s at 30°…

A:

Q: A dolphin wants to swim directly back to its home bay, which is 0.800 km due west. It can swim at a…

A:

Q: The wind is blowing at 70.0 mph in a direction 30.0 degrees south of east. A pilot is flying a plane…

A: In this question we have to find the direction of the plane and its speed. Please give positive…

Q: A pilot wants to fly due north, but finds that he must direct his plane 19.0° to the east to…

A: Given data The velocity of the plane's airspeed is Vpw = 200 km/h. The plane is directed to an…

Q: A car travels 30 km, in a direction 50° north of east. The eastward (horizontal) component of the…

A:

Q: A boat is traveling upstream at 13 km/h with respect to the water of a river. The water is flowing…

A:

Q: A boat is traveling upstream at 12 km/h with respect to the water of a river. The water is flowing…

A: The objective of the question is to find the magnitude and direction of the boat's velocity with…

Q: The river runs straight north-south with a current 4mph south. You paddle straight from west to east…

A: Solution:   Given Data,     vp=Speed of person along the west-east =3 mph  vc=Speed of current along…

Q: A motorboat is racing towards north at 25km/h and the water current in that region is 10km/h in the…

A:

Q: A pilot flies with a heading of 160° and an airspeed of 250 km/h. There is a steady wind of 30 km/h…

A: The ground velocity of an aircraft is the speed and direction at which the aircraft is moving…

Q: A river flows in the direction due north. The speed of the current is 5 km/hr. A boat with a speed…

A:

Q: A boat whos speed in still water is 5.0m/s headed west across a river. The river current is 2.5m/s…

A:

Q: A person is flying from point A to Point B, a displacement of 6345km [E 21 N]. The pilot has noted…

A: The wave velocity definition is given as the velocity associated with the disturbance propagating in…

Q: A river is flowing from west to east at a speed of 10.0 km/h. A boat’s speed in the water is 20.0…

A:

Q: A small ship capable of making a speed of 6.5 knots through still water maintains a heading due east…

A:

Q: A jetliner has a cruising air speed of 600 mph relative to theair. How long does it take this plane…

A: Given

Q: The compass in a plane indicates that the plane is heading east; its air speed indicator reads 221…

A:

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.