# Physics

A rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge 235 m below. Assume the plane is traveling horizontally with a speed of 195 km/h (54.2 m/s).
Suppose, instead, that the plane releases the supplies a horizontal distance of 425 m in advance of the mountain climbers. What vertical velocity (up or down) should the supplies be given so that they arrive precisely at the climbers' position (assume up is positive).
With what speed do the supplies land in the latter case?

1. 👍 1
2. 👎 0
3. 👁 7,881
1. 425 = 54.2 t
t = 7.84 seconds in air

h = ho + Vi t - 4.9 t^2
-235 = Vi (7.84) - 4.9 (7.84)^2
-235 = 7.84 Vi - 301
Vi = 8.45 m/s up
------------------------------
Horizontal speed = 54.2 always
find vertical speed at rocks
v = Vi - g t
v = 8.45 - 9.8 (7.84)
v = -68.4
so speed = sqrt (54.2^2 + 68.4^2)

1. 👍 7
2. 👎 13

## Similar Questions

1. ### Math

Expressed to the correct number of significant figures, the sum of two masses is 445.2 grams. WHich two masses produce this answer? 1) 210.10 g+235.100g 2)210.100 g + 235.10 g 3) 210.1 g + 235.1 g 4) 210.10 g+ 235.10 g I think the

2. ### SS and i need SOS. please help me

1.Who Were Among the first permanent White settlers in Oregon. A.Farmers B.Trappers C.Missionaries D.traders 2.What was the Rendezvous and why was it important to the maintain men a:it was the largest trading company in the west

3. ### science

The pilot of an airplane traveling 180km/h wants to drop supplies to flood victims isolated on a patch of land 160m below. The supplies should be dropped how many seconds before the plane is directly overhead?

4. ### physics

A rock climber throws a small first aid kit to another climber who is higher up the mountain. The initial velocity of the kit is 16 m/s at an angle of 55° above the horizontal. The kit is caught right at the peak of the its

1. ### physics

A supply plane needs to drop a package of food to scientists working on a glacier in Greenland. The plane flies 92 m above the glacier at a speed of 135 m/s. How far short of the target should it drop the package?

2. ### Physics

The pilot of an airplane traveling 160 km/h wants to drop supplies to flood victims isolated on a patch of land 160m below. The supplies should be dropped how many seconds before the plane is directly overhead?

3. ### Physics

A rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge H = 231 m below. If the plane is traveling horizontally with a speed of 227 km/h (63.1 m/s), how far in advance of the recipients (horizontal

4. ### History

What was the Rendezvous and why was it important to the Mountain Men? A. It was the largest trading company in the West and the Mountain Men traded their pelts to the company for supplies. B. It was a fort where the Mountain Men

1. ### Social studies

What type of map would you use to locate the rocky mountain