From rest, a rock is dropped from a garage roof. The roof is 6.0 meters above ground level. The rock will reach the earth at a speed of 10.849 meters per second.
<h3>What is velocity?</h3>
The change of displacement with respect to time is defined as the velocity. Velocity is a vector quantity.
it is a time-based component. Velocity at any angle is resolved to get its component of x and y-direction.
Given data:
V(Final velocity)=? (m/sec)
h(height)= 6.0 m
u(Initial velocity)=0 m/sec
g(gravitational acceleration)=9.81 m/s²
Newton's third equation of motion:
Hence, the velocity of the rock as it hits the ground will be 10.849 m/sec.
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Answer:
Explanation:
sin^2 60° = ( \|3 / 2 ) ^2 = 3 / 4.
The ideal mechanical advantage will be 8.017. The ideal mechanical advantage value may be grater than the actual value of mechanical advantage.
<h3>What is mechanical advantage ?</h3>
Mechanical advantage is a measure of the ratio of output force to input force in a system, it is used to obtained efficiency of forces in levers and pulley.
The ideal mechanical advantage is found as;
The ideal mechanical advantage will be 8.017.
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Answer:
<h3>t = 100secs</h3>
Explanation:
The following data
Distance x = 17km = 17000m
Speed v = 340m/s
Using the formula to get the time;
2x = vt
t = 2x/v
t = 2(17000)/340
t = 34000/340
t = 100secs
<em>Hence it takes 100seconds for the sound to reach your ears</em>
