Huck Finn walks at a speed of 1 m/s across his raft. The raft is traveling down river at a speed of 2 m/s. What is the magnitiude of Huck's velocity relative to the river bank?

A stationary radar operator determines that a ship is 10 km south of him. An hour later the same ship is 20 km southeast of him. If the ship moved at a constant velocity and always in the same direction. What was its average velocity during this time in both magnitude and direction?

Bob has just finished climbing a sheer cliff above a level beach and wants to figure out how high he climbed. All he has to use is a baseball, a stopwatch, and a friend on the ground below with a long measuring tape. Bob is a pitcher and knows that the fastest he can throw the ball is about vo = 33.7 m/s. Bob starts the stopwatch as he throws the ball, with no way to measure the ball's initial trajectory, and watches carefully. The ball rises and then falls, and after t₁ = 0.710 s the ball is once again level with Bob. Bob cannot see well enough to time when the ball hits the ground. Bob's friend then measures that the ball hit the ground x = 123 m from the base of the cliff. How high above the beach was the ball when it was thrown? initial height: X 1₁ m

A small boat is moving at a velocity of 1.73m/s when it is accelerated by a river current perpendicular to the initial direction of motion. the acceleration of the current is 0.75m/(s^ 2) what will be the new velocity of the boat after 17.3 ?

A baseball fan sitting in the "cheap seats" is d = 171 m from home plate (see the figure below). How much time elapses between the instant the fan sees a batter hit the ball and the moment the fan hears the sound? (Assume the speed of sound is 344 m/s, and the vertical distance can be ignored.)

Your bow can fire arrows at 70 ??. You shoot an arrow straight up into the air. After 1 second, you shoot anotherarrow into the air.a) If you are shooting the arrows from 2 m above the ground, how far above the ground do the arrowscollide? (Answer: 251 m)

8. A 70 m wide river flows at 0.80 m/s. A girl swims across it at 1.4 m/s relative to the water. (a) What is the least time she requires to cross the river? (b) How far downstream will she be when she lands on the opposite shore? (c) At what angle to the shore would she have to aim, in order to arrive at a point directly opposite the starting point? (d) How long would the trip in part (c) take?

A kicker on the football field kicked the ball with a velocity of 18.0 m/s at an angle of 21° to the horizontal. How long was the ball in the air?