Answer:
810.37 m/s
Explanation:
s = Displacement = 5 m
= Speed of sound in air = 343 m/s
Time taken to travel the distance
Time for the sound in metal
Speed of sound is given by
The speed of sound in the metal is 810.37 m/s
By applying the third law of motion, which force is greater when you push on a wall? Your force, the wall’s force, your force an
2 answers:
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Answer:
The distance the train travels before coming to a (complete) stop = 40/81 km which is approximately 493.83 meters
Explanation:
The initial speed of the train u = 80 km/h = 22 2/9 m/s = 22. m/s
The magnitude of the constant acceleration with which the train slows, a = 0.5 m/s²
Therefore, we have the following suitable kinematic equation of motion;
v² = u² - 2 × a × s
Where;
v = The final velocity = 0 (The train comes to a stop)
s = The distance the train travels before coming to a stop
Substituting the values gives;
0² = 22.² - 2 × 0.5 × s
2 × 0.5 × s = 22.²
s = 22.²/1 = 493 67/81 m = 40/81 km
The distance the train travels before coming to a (complete) stop = 40/81 km ≈ 493.83 m.