1.
Suppose a football player kicks a football with an initial velocity of 22 yards per second at an angle of 63° to the horizontal. Suppose a kick returner catches the ball 3.6 seconds later. What is the vertical height of the ball at that time?
A.
about 4.3 feet
B.
about 3.9 feet
C.
about 2.6 feet
D.
about 5.4 feet
Hint
2.
Find the initial horizontal velocity of a javelin thrown at 70 feet per second at an angle of 55° with the horizontal.
A.
about 40 ft/s
B.
about 30 ft/s
C.
about 20 ft/s
D.
about 50 ft/s
Hint
3.
Hetu is playing catch with a friend. If Hetu throws the ball at 21.3 m/s, at an angle of 30° with the horizontal, and his friend catches the ball at the same height from which Hetu threw it, how long is it before his friend catches the ball?
A.
10.65 s
B.
1.41 s
C.
2.17 s
D.
0.46 s
Hint
4.
Karla is in a contest to see who can hit a baseball the farthest. If she hits a ball with an initial velocity of 94.5 ft/s at an angle of 42° with the horizontal, how far will the ball travel before it hits the ground?
A.
250 ft
B.
277 ft
C.
139 ft
D.
395 ft
Hint
5.
If a quarterback throws a 30-yard pass to his receiver with an initial velocity of 21 yards per second at an angle of 15
with the horizontal, how long is the ball in the air?
A.
1.48 s
B.
0.68 s
C.
5.52 s
D.
1.43 s
Hint