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Homework Results / Ödev Sonuçları

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Answers of HW II

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r=(3t-4)i+(t³-4t)j

Calculate the velocity of particle when t=3.

Ans: (3i + 23j) m/s

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A stone is thrown from a point on horizontal ground with speed 150 m/s at an angle of 10^o to the horizontal. Calculate the range of the stone.

Ans: 785

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A stone is thrown from a point P on level ground with speed 24 m/s. The stone is thrown at an angle Q to the horizontal where sin Q=4/5. The stone moves freely and hit the ground at point B. Calculate the distance between points P and B.

Ans: 56 m

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A stone is thrown with speed 21 m/s at an angle of elevation Q. If the stone reached the greatest height of 15 m, find the value of Q.

Ans: 54.7o

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A stone is thrown from the origin with velocity (12i + 24j) m/s. Calculate the speed of the stone after 3 s.

Ans: 13 m/s

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A stone thrown from horizontal ground with initial speed u at an angle of elevation of Q where tan Q=3/4. The stone hit a vertical wall which is 20 m away at a point which is 3 m above the ground. Find its initial speed.

Ans: 16 m/s

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A stone thrown from point A as shown in the figure. If the takes 4 second from A to B find the value of u.

Ans: 4.4

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A stone thrown from point A as shown in the figure. Calculate the distance between points A and B.

Ans : 34 m