University:
Concordia University Wisconsin
Course:
PHYS 1514 | General Physics I
Academic year:

2021
Views:

192

Pages:

2
Author:

Maverick Martin

Kinematics #5 (name) 1. A diver takes off with a speed of 8.0 /s from a 3.0 m high diving board at 30.° above the horizontal. How much later does she strike the water? m t= . 2. A pilot cuts loose two fuel tanks in an effort to gain altitude. At the time of release, the plane was 120 m above the ground and travelling upward at 30° to the horizontal, with a speed of 84 m/s. For how long did the tanks fall and with what speed did they hit the ground? vf = t= 21 . . 3. On level ground, a ball is thrown forward and upward. The ball is in the air 2.0 s and strikes the ground 30.m from the thrower. What was the ball's initial velocity? vi = . 4. An archer standing on the back of a pickup truck moving at 28 m/s fires an arrow straight up at a duck flying directly overhead. The archer misses the duck! The arrow was fired with an initial velocity of 49 m/s relative to the truck. (a) For how long will the arrow be in the air? t= . d= . (b) How far will the truck travel while the arrow is in the air? (c) Where, in relation to the luckless archer, will the arrow come down? Will the archer have to 'duck'? Answers: 1. 1.3 s 4. a) 10. s b) 280 m 2. 11s, 97 m/s[41o below horiz] 3. 18 m/s [33° above horiz] c) on top of the archer, he needs to ‘duck’! 22

Kinematics #5

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