1. A projectile launched over level ground reaches its maximum height in 10 seco

Question

1. A projectile launched over level ground reaches its maximum height in 10 seconds. Approximately what was the range of the projectile if it was launched with a speed of 200m/s.

2. A placekicker must kick a football form a point 36.0 (about 40 yards) from the goal. Half the cron hopes the ball will clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 20.0 m/s at an angle of 53.0 to the horizontal. a. by how much does the ball clear or fall short of clearing the crossbar? b. Does the ball approach the crossbar while still rising or while falling?

Explanation / Answer

using v = uy + at

0 = u - 9.8x10

uy = 98 m/s

ux= sqrt(u^2 - uy^2) = 174.34 m/s

total time will double of max. height = 20 sec

R = ux *t = 3486.90 m

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.