A man stands on the roof of a 15.0 m tall building and throws a rock with a velocity of magnitude 30.0 m/s at an angle of 30° above the horizontal. Ignoring air resistance, how long will it take for the rock to reach the ground? a. 0.79s b. 0.5s c. 3.86s d. 2.0s

On planet #3, you fire a projectile horizontally from the edge of a vertical cliff 69.9 m above the ground, with an initial speed of 59.8 m/s. The projectile lands 67.2 m away from the base of the cliff. What is the value of g for planet #3?   a. 183.63 m/s^2   b. 110.71 m/s^2   c. 55.35 m/s^2   d. 49.18 m/s^2 2.  On planet #4, you fire a projectile from the ground at an initial speed of 20.0 m/s at an angle of 43.1 degrees above the horizontal. The projectile lands 78.7 m away from the launch point. What is the value of g for planet #4?   a. 3.5 m/s^2   b. 309.0 m/s^2   c. 211.6 m/s^2   d. 5.1 m/s^2

A football is kicked at an angle of 30° with a speed of 20 m/s. To the nearest second, how long will the ball stay in the air?A. 1 s              B. 2 s              C. 3 s            D. 4 s

In a ballistic pendulum lab we used the law of projectile to determine the initial velocity. The ball was released with some initial speed V from the table, the table has an altitude of 1.1 m and the ball land 2.3 m away. What is the muzzle velocity of the ball as it shot from the gun? 4.9 m/s O 7.0 m/s O 6.1 m/s O 8.0 m/s