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:
They are able to balance torques due to gravity.
Explanation:
When two friends of different masses will balance themselves on see saw then at equilibrium position the see saw will remain horizontal
This condition will be torque equilibrium position where the see saw will not rotate
Here we can say
here we know that force is due to weight of two friends
and their positions are different with respect to the lever about which see saw is rotating
since both friends are of different weight so they will balance themselves are different positions as per above equation