A 1000kg helicopter hovers over a forest fire and starts to squirt water downward with a speed of 10m/s at a rate of 40kg/s. What is the initial upward acceleration on the helicopter when it first starts to release the water
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- Use g = 10 m/s/s.As shown in picture, the person is twirling a garden hose over his head. The hose lies in a Horizontal plane, and the water is flowing through it at a constant rate of 3 m/s. Determine the magnitude of the velocity and acceleration of water particle as it exits the open end, r=1.5 m e = 2 rad/s 6 = 3 rad/s r= 1.5 mA ball of mass m is shot straight up into the air with an initial speed vj. (a) What is the maximum height reached by the ball (in terms of vj and g)? (b) A second ball is dropped from rest from a height, h, directly above the first ball, and is released at the same time that the first ball is shot upwards. At what height will the two balls collide? Provide an expression in terms of h, Vị, and g. (c) From what height should the second ball be dropped from so that the two balls collide when the first ball is at its maximum height?
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- Large birds like pheasants often walk short distances. Small birds like chickadees never walk. They either hop or fly. Why might this be?A firecracker moves vertically upward and after reaching the highest point in its vertical trajectory, it starts falling down. After it falls down by 17.7 meters in air it cracks into two identical pieces. One of the pieces shoots off horizontally with 11.8 m/s speed. What would be the magnitude of the velocity of the other piece right after they split? Enter your answer in m/s. On your paper, show both your calculation for the magnitude and also the direction of the velocity vector of the second piece. Show your work in detail including your physics- based reasoning.You and four of your friends are all interested in getting out of town for a break. Two of your friends just want to relax while the other two want to get some exercise. You need some quiet time to study. To satisfy everyone, the group decides to spend the day canoeing on the river. Two people will put a canoe in the river and just drift downstream with the 1.5 km/h current. The second pair will begin at the same time as the first from 10. km downstream. They will paddle upstream until the two canoes meet. Since you have been canoeing with these people before, you know that they can paddle at 4.0 km/h in still water. When the two canoes meet, they will come to shore and you should be there to meet them with the picnic lunch. You decide to go to that spot ahead of time so you can study while you wait for your friends. How far from where the drifters launched will you wait for them? After lunch you decide to paddle across the river, which is 0.50 km wide. You can paddle 3.0 km/h in…
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