Angled launch Knowledge-Based Practice

Questions

1. 1.

   A projectile is launched from horizontal ground such that its maximum height is 45 m and its horizontal range is 180 m. Neglecting air resistance, what is the launch angle of the projectile above the horizontal?

   • A) 30°
   • B) 45°
   • C) 53°
   • D) 60°
2. 2.

   A projectile is launched from flat ground with an initial speed of 40 m/s at an angle of 30° above the horizontal. Neglecting air resistance, what is the total time of flight of the projectile before it returns to the ground? (Take $g = 10\text{ m/s}^2$ and $\sin 30^\circ = 0.5$.)

   • A) 2 s
   • B) 3 s
   • C) 4 s
   • D) 8 s
3. 3.

   A projectile is launched from flat ground with an initial speed of 60 m/s at an angle of $60^\circ$ above the horizontal. Neglecting air resistance, what is the speed of the projectile at the highest point of its trajectory? (Take $\cos 60^\circ = 0.50$ and $\sin 60^\circ = 0.87$.)

   • A) 0 m/s
   • B) 52 m/s
   • C) 60 m/s
   • D) 30 m/s
4. 4.

   A projectile is launched from horizontal ground with an initial velocity of 25 m/s at an angle of $37^\circ$ above the horizontal. Neglecting air resistance, what is the horizontal range of the projectile when it returns to the ground? (Take $g = 10\text{ m/s}^2$, $\sin 37^\circ = 0.6$, and $\cos 37^\circ = 0.8$.)

   • A) 60 m
   • B) 30 m
   • C) 45 m
   • D) 75 m
5. 5.

   A projectile is launched from flat ground with an initial speed of 50 m/s at an angle of $53^\circ$ above the horizontal. Neglecting air resistance and taking $g = 10\text{ m/s}^2$, $\sin 53^\circ = 0.8$, and $\cos 53^\circ = 0.6$, what is the maximum height reached by the projectile?

   • A) 80 m
   • B) 125 m
   • C) 45 m
   • D) 160 m

Answers and step-by-step solutions appear after you finish the test.