Answer:
Explanation:
average deceleration= ?
inial velocity:
final velocity:
time:
The first law of kinematics :
find a the subject of the formula
The deceleration about g(acceleration due to gravity) will be:
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The weight is in equilibrium, so the two forces acting on it (tension <em>T</em> pulling upward, and its own weight <em>W</em> pulling it downward) cancel each other. By Newton's second law,
∑ <em>F</em> = <em>T</em> - <em>W</em> = 0
so that
<em>T</em> = <em>W</em>
Calculate the object's weight:
<em>W</em> = (20 kg) (9.8 m/s²) = 196 N
So the tension is <em>T</em> = 196 N as well.
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The distance travelled by the ball that is thrown horizontally from a window that is 15.4 meters high at a speed of 3.01 m/s is 5.34 m
s = ut + 1 / 2 at²
s = Distance
u = Initial velocity
t = Time
a = Acceleration
Vertically,
s = 15.4 m
u = 0
a = 9.8 m / s²
15.4 = 0 + ( 1 / 2 * 9.8 * t² )
t² = 3.14
t = 1.77 s
Horizontally,
u = 3.01 m / s
a = 0 ( Since there is no external force )
s = ( 3.01 * 1.77 ) + 0
s = 5.34 m
Therefore, the distance travelled by the ball before hitting the ground is 5.34 m
To know more about distance travelled
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