How many seconds after the first snowball should you throw

Assignment Help Physics

Reference no: EM132390338

Answer the Following Questions :

Question 1

Two airplanes leave an airport at the same time. The velocity of the first eirplane is 680 m/h at a heading of 40.9°. The velocity of the second is 610 m/h at a heading of 102. How far apart are they after 3.4 h? Answer in units of m.

Question 2

One strategy in a snowball fight is to throw a snowball at a high angle over level ground. While your opponent is watching this first snowball, you throw a second snowball at a low angle and time it to arrive at the same time as the first.

Assume both snowballs are thrown with the same initial speed 28.6 m/s. The first snowball is thrown at an angle of 56° above the horizontal. At what angle should you throw the second snowball to make it hit the same point as the first? The acceleration of gravity is 9.8 m/s2. Answer in units of .

Question 3

How many seconds after the first snowball should you throw the second so that they arrive on target at the same time? Answer in units of s.

Question 4

An Alaskan rescue plane traveling 44 m/s drops a package of emergency rations from a height of 146 in to a stranded party of explorers. The acceleration of gravity is 9.8 m/s2. Where does the package strike the ground relative to the point directly below where it was released? Answer in units of m.

Question 5

What is the horizontal component of the velocity just before it hits? Answer in units of m/s.

Question 6

What is the vertical component of the velocity just before it hits? (Choose upward as the positive vertical direction). Answer in units of m/s.

Question 7

To win the game, a place kicker must kick a football from a point 42 m (45.9312 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 23 m/s at an angle of 33.1° from the horizontal.The acceleration of gravity is 9.8 m/s2. By how much vertical distance does the ball clear the crossbar? Answer in units of m.

Question 8

A cat chases a mouse across a 0.71 m high table. The mouse steps out of the way, and the cat slides off the table and strikes the floor 1.9 m from the edge of the table. The acceleration of gravity is 9.81 m/s2. What was the cat's speed when it slid off the table? Answer in units of m/s.

Question 9

Given: The battleship and enemy ships A and B lie along a straight line. Neglect air friction. A battleship simultaneously fires two shells at these two enemy ships. If the shells follow the parabolic trajectories shown in the figure, yhich ship acts hit first?

243_Q 13.jpg

1. B
2. need more information
3. both at the same time
4.A

Question 10

A jet airliner moving initially at 406 mph (with respect to the ground) to the east moves, into a region where the wind is blowing at 962 mph in a direction 54° north of east. What is the new speed of the aircraft with respect to the ground? Answer in units of mph.

Question 11

A cheetah can run at a maximum speed 94.4 km/h and a gazelle can run at a maximum speed of 79.2 km/h. If both animals are running at full speed, with the gazelle 66 m ahead, how long before the cheetah catches its prey? Answer in units of s.

Question 12

The cheetah can maintain its maximum speed for only 7.5 s. What is the minimum distance the gazelle must be ahead of the cheetah to have a chance of escape? (After 7.5 s the speed of cheetah is less than that of the gazelle.) Answer in units of m.

Question 13

Cliff divers at Acapulco jump 11th) the sea from a cliff 33 in high. At the level of the sea, a rock sticks out a horizontal distance of 7.52 m. The acceleration of gravity is 9.8 m/s2.With what minimum horizontal velocity must the cliff divers leave the top of the cliff if they are to miss the rock? Answer in units of m/s.

Question 14

Salmon often jump waterfalls to reach their breeding grounds. Starting downstream, 3.14 m away from a waterfall 0.517 m in height, at what minimum speed must a salmon jumping at an angle of 27.6° leave the water to continue upstream? The acceleration due to gravity is 9.81 m/s2. Answer in units of m/s.

Question 15

A ball is thrown horizontally from the top of a building 100 m high. The ball strikes the ground 76 m horizontally from the point of release.

What is the speed of the ball just before it strikes the ground? Answer in units of m/s.

Question 16

A ski jumper travels down a slope and leaves the ski track moving in the horizontal direction with a speed of 21 m/s as in the figure.
The landing incline below her falls off with a slope of θ = 36° . The acceleration of gravity is 9.8 m/s2 Calculate the distance d she travels along the incline before landing. Answer in units of m.

Question 17

Determine how long the ski jumper is airborne. Answer in units of s.

Question 18

What is the magnitude of the relative angle Φ with which the ski jumper hits the slope? Answer in units of °.

Reference no: EM132390338

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