A key falls from a bridge that is 38 m above the water. It falls
directly into a model boat, moving with constant velocity, that was
11 m from the point of impact when the key was released. What is
the speed of the boat?
___ m/s

A key falls from a bridge that is 38 m above the water. It falls directly...
Answer: 10.12 A key is dropped from a bridge that is 40.0 m bove the water. At the moment the key is released a model boat is 10.5 m away from the bridge and moving towards the bridge with constant velocity. If the key falls directly into the model boat, calculate the Velocity of the boat. Answer: 11. [2pt] Arie is aimed honuntaily a target located 345 m away. The ballet hits the target 25 cm below the aim point....
(10 pts) A water balloon is dropped vertically from a height of 44 m above the sidewalk. It lands on the feet of a person who is walking along the sidewalk at a constant velocity When the balloon is released at t 0, the person is i2 m from the point of impact. Ignoring air resistance effects, determine the walking speed of the person. You should calculate that the time to impact is approx. 3 s.]
A stone is dropped from a bridge that is 18.0 m above a stream. A piece of driftwood floating down the stream is at a distance of 2.26 m from the bridge when the stone is released. If the stone lands on the wood, what is the speed of the stream? Another stone is thrown straight up from the bridge with an initial speed of 3.00 m/s. It just misses the edge of the bridge on the way down and...
7. A ball is thrown vertically downward from the edge of a bridge 24.0 m high with an initial speed of 12.0 m/s. The ball falls all the way down and strikes the water below. Determine the time it takes the ball to strike the water. 3.75 8. A photographer in a helicopter ascending vertically at a constant rate of 1.2 m/s accidentally drops m above the ground. (a) How long will it take the camera to reach the ground?...
A suspension bridge is 62.0 m above the level base of a gorge. A stone is thrown or dropped from the bridge. At the location of the bridge, g has been measured to be 9.83 m/s2. In each of the following, assume that there is no air resistance. (a) If you drop the stone, how long does it take for it to fall to the base of the gorge? s (b) If you throw the stone straight down with a...
An 80.0 kg bungee jumper drops from rest off a bridge that is 200.0 m above a river. As he falls, air resistance is negligible, and the unstretched bungee cord attached to him uncoils. The mass of the bungee cord is negligible. When the jumper is 50.0 m below the bridge, the bungee cord is completely uncoiled and forms a straight line. Below that point, the bungee cord acts as a spring, obeying Hooke's law as it is stretched beyond...
A 10.0 kg ball is released from rest in an ocean. As it falls, the water applies a resistive force R = −bv, where v is its velocity. At a time 6.14 s after its release, the ball is moving at half of its terminal speed. (Ignore any buoyant force.) (a) What is the ball's terminal speed (in m/s)? m/s (b) At what time after release (in s) is its speed three-fourths of its terminal speed? s (c) How far...
A stone is dropped into a river from a bridge 41.2 m above the water. Another stone is thrown vertically down 1.35 s after the first is dropped. Both stones strike the water at the same time. What is the initial speed of the second stone?
A stone is dropped into a river from a bridge 47.8 m above the water. Another stone is thrown vertically down 1.60 s after the first is dropped. Both stones strike the water at the same time. What is the initial speed of the second stone?
A boat can travel 2.30 m/s in still water. If the boat point its prow directly across a stream whose current is 1.50 m/s. What is the magnitude of the velocity of the boat relative to the shore? v_y = m/s What is the angle of the velocity of the boat relative to the share? theta = What will be the position of the boat, relative to its point of origin, after 7.00 s? Assume that the positive x and...