What is speed?.............
1 answer:
Speed is a scalar quantity indicating how fast an object is moving, defined by the equation
Explanation:
Speed is a scalar quantity which tells how fast an object is moving, regardless of its direction.
The speed of an object can be calculated as follows:
where
d is the distance covered by the object
t is the time interval taken by the object to cover that distance
The SI units of the speed is the metre per second (m/s).
Speed must not be confused with velocity, which is instead a vector quantity, given by
where displacement is a vector measuring the distance in a straight line between the initial and final position of the object. Since velocity is a vector, the direction matters, therefore an object can have different speed and velocity. For instance, an object completing a full circle has non-zero speed (because the distance covered is non-zero), but its velocity is zero (since the displacement is zero, because the object returns to its starting position).
Learn more about speed and velocity:
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Answer:
<em>The power output of the engine is 1,000 Watt</em>
Explanation:
<u>Mechanical Power </u>
Power is the amount of energy transferred or converted per unit of time. In the SI, the unit of power is the watt, equal to one joule per second.
The power can be calculated as:
Where W is the work and t is the time.
The engine does a work of W=60,000 J during t=60 s. Calculate the power:
P = 1,000 Watt
The power output of the engine is 1,000 Watt