Math

QuestionA cannon is fired horizontally from a height of 5.0 m5.0 \mathrm{~m}. How long until it hits the ground?

Studdy Solution

STEP 1

Assumptions1. The cannonball is fired horizontally, so its initial vertical velocity is0. . The height of the tower is5.0 m.
3. The acceleration due to gravity is 9.8 \, m/s^.
4. We are neglecting air resistance.

STEP 2

We will use the equation of motion to solve this problem. The equation that relates distance, initial velocity, time, and acceleration isd=vit+12at2d = v_i t + \frac{1}{2} a t^2

STEP 3

In this case, the initial vertical velocity (viv_i) is0, and the distance (d) is the height of the tower. So the equation simplifies tod=12at2d = \frac{1}{2} a t^2

STEP 4

We can solve this equation for time (t) by multiplying both sides by2, then dividing by acceleration (a), and finally taking the square root of both sidest=2dat = \sqrt{\frac{2d}{a}}

STEP 5

Now, we can plug in the given values for the distance (d =5.0 m) and acceleration (a =9.8 m/s²) to calculate the timet=2×5.0m9.8m/s2t = \sqrt{\frac{2 \times5.0 \, m}{9.8 \, m/s^2}}

STEP 6

Calculate the time it takes for the cannonball to hit the groundt=10m9.8m/s21.01st = \sqrt{\frac{10 \, m}{9.8 \, m/s^2}} \approx1.01 \, sThe cannonball will hit the ground after approximately1.01 seconds.

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