What is the maximum height that the rocket reaches

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Reference no: EM131105896

A stone is thrown straight downward with a speed of 20 m/s from the top of a tall building. If the stone strikes
the ground 3.0 s later, about how tall is the building? Assume air resistance is negligible.

(A) 45 m

(B) 60 m

(D) 105 m

(E) 120 m

A coyote can run at a speed of 20 m/s while a prairie dog can manage only 5.5 m/s. If a prairie dog is 45 m in
front of a coyote, what is the maximum time it has to reach its hole without being caught?

(A) 2.3 s

(B) 3.1 s

(D) 5.9 s

(E) 8.2 s

A model rocket accelerates from rest upwards at 50 m/s2

(A) 100 m

(B) 510 m

(D) 1020 m

(E) 1220 m

for 2.0 s before its engine burns out. The rocket then coasts upward. What is the maximum height that the rocket reaches?

You may assume air resistance is negligible.

A hunter in a forest walks 800 m west. He then turns south and walks 400 m before turning west again and walking a final 300 m. At the end of the walk, what is the magnitude of the hunter's displacement from the beginning?

(A) 640 m

(B) 890 m

(D) 1390 m

(E) 1500 m

Reference no: EM131105896

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