Projectile motion Knowledge-Based Download PDF

Questions

1. 1.

   A projectile is launched from horizontal ground with an initial speed of 50 m/s. If its speed at the highest point of its trajectory is 30 m/s, what is the horizontal range of the projectile? (Take $g = 10\text{ m/s}^2$ and neglect air resistance.)

   • A) 120 m
   • B) 160 m
   • C) 240 m
   • D) 320 m
2. 2.

   A projectile is launched from level ground with an initial speed of 50 m/s at an angle of 53° above the horizontal. Neglecting air resistance and taking $g = 10\text{ m/s}^2$, what is the total time of flight of the projectile before it returns to the ground? ($\sin 53^\circ = 0.8$, $\cos 53^\circ = 0.6$)

   • A) 4 s
   • B) 8 s
   • C) 5 s
   • D) 10 s
3. 3.

   A ball is launched horizontally at a speed of 15 m/s from the top of a 20 m high vertical cliff. Neglecting air resistance and taking g = 10 m/s², what is the horizontal distance traveled by the ball before it strikes the ground?

   • A) 15 m
   • B) 20 m
   • C) 25 m
   • D) 30 m
4. 4.

   A projectile is launched from horizontal ground with an initial speed of 40 m/s at an angle of 30° above the horizontal. Neglecting air resistance and taking $g = 10\text{ m/s}^2$, what is the maximum height reached by the projectile?

   • A) 20 m
   • B) 40 m
   • C) 60 m
   • D) 80 m