1) The horizontal component of speed for a projectile fired horizontally from so

Question

1) The horizontal component of speed for a projectile fired horizontally from some height a) decreases after t ime "t". [1 Point] b) increases c(remains constant) d) depends on launch angle 2) Define range of a projectile. [1 Point] The hori zontal disptacoment of a projectile in 1 y-direction is zero 3) Use equation (1) and (2) to express Vox in terms of R, yo and g. Show your work. [2 Points] 4) You should be familiar with a quadratic equation of the form ax2 +bx + c = 0, The solution/s for 'x' for this form is given by: [1 Point] A projectile is fired at an angle of 30° with the horizontal at a speed of 30 m/s. Calculate initial horizontal and vertical component of its speed. [1 Point] 5) 6) What tool do you use to push steel ball down the muzzle? Why is it important to use this tool? [Hint: Read procedure for part A] [1+1 2 Points] For a projectile fired vertically from the ground, the vertical component of the magnitude of its velocity (increases, decreases, remains constant) as it is falling down from the maximum height. [1 point] 7) For a projectile fired vertically from the ground, the acceleration due to gravity (increases, decreases, remains constant) while it is moving up. [1 point] 8) 43

Explanation / Answer

2)

The horizontal displacement of the particle is known as the range

5)

Vox = horizontal component = Vo Costheta = 30 Cos30 = 26 m/s

Voy = vertical component = Vo Sintheta = 30 Sin30 = 15 m/s

7)

increases

while falling down , the acceleration is in same direction as the velocity of the projectile, hence the projectile speeds up

8)

remains constant

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