As shown in the figure below, a ski jumper leaves the ski track moving horizontally with a speed of vi=20m/s. The landing track below her is an incline at an angle of =37 to the horizontal. The horizontal distance the jumper travels before she lands on the incline is A 120m B. 100m C. 75m D. 60m E. 45m Ans: D A stone i

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As shown in the figure below, a ski jumper leaves the ski track moving horizontally with a speed of

v_{i} = 20 m / s

. The landing track below her is an incline at an angle of

θ = 3 7^{\circ}

to the horizontal. The horizontal distance the jumper travels before she lands on the incline is A

120 m

B.

100 m

C.

75 m

D.

60 m

E.

45 m

Ans: D A stone is thrown from ground level at an angle of

θ

above the horizontal such that the ratio of the

x

-component of its initial velocity to the

y

-component of its initial velocity is 2 . The stone strikes a wall

6 m

away and at a height of

2 m

above the ground. Calculate the initial speed of the stone. A.

25 m / s

B.

30 m / s

C.

10 m / s

D.

20 m / s

E.

15 m / s

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