A Boy Throws a Rock with an Initial Velocity of 2.15
A boy throws a rock with an initial velocity of 2.15 m/s at 30.0° above the horizontal.If air resistance is negligible,how long does it take for the rock to reach the maximum height of its trajectory?
A) 0.110 s
B) 0.194 s
C) 0.215 s
D) 0.303 s
What is the maximum distance we can shoot a dart,from ground level,provided our toy dart gun gives a maximum initial velocity of 2.78 m/s and air resistance is negligible?
A) 0.789 m
B) 1.58 m
C) 1.39 m
D) 0.394 m
A catapult is tested by Roman legionnaires.They tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): Range = 0.20 km;
Angle of launch = π/4; landing height = launch height.What is the initial velocity of launch of the boulders if air resistance is negligible?
A) 44 m/s
B) 1.4 m/s
C) 22 m/s
D) 0.69 m/s
A hobby rocket reaches a height of 72.3 m and lands 111 m from the launch point with no air resistance.What was the angle of launch?