A tennis ball is hit into the air with a racket. when is the ball’s kinetic energy the greatest? ignore air resistance.
1 answer:
When the player strikes the ball, kinetic energy is at its greatest.
Kinetic energy = 1/2*m*
where m denotes mass and v denotes velocity.
Therefore, kinetic energy is inversely correlated with square of velocity.
When a player strikes the ball, velocity is at its highest.
Thus, when the player strikes the ball, kinetic energy is at its highest.
<h3>What is kinetic energy?</h3>It is the energy that a body has because it is moving.
<h3>Which 5 forms of kinetic energy are there?</h3>Kinetic energy comes in five different forms:
- radiant
- thermal
- sound
- electrical
- mechanical.
Kinetic energy is measured in Joules.
Importance of kinetic energy:
- The capacity to perform work is kinetic energy's most significant quality.
- Force acting on an object while it is moving is referred to as work.
- Energy and work are interchangeable because of their tight relationship.
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Answer:
The second vector points due West with a magnitude of 600N
Explanation:
The original vector points with a magnitude of 200N due east, the Resultant vector
points due west (that's how east/west direction can be interpreted, from east to west) with a magnitude of 400N. If we choose East as the positive direction and West as the negative one, we can write the following vectorial equation:
With the negative sign signifying that the vector points west.