state 3 examples of second law of motion
Answers
~An example of when the forces are balanced can be performed by you by simply standing up. The force of gravity is pulling you down to the ground but the ground resists, causing it to create a reaction force in the opposite direction to balance the forces. This causes you to stay standing still and not sink into the ground or float away.
~Another example when the forces are balanced is during skydiving when you’ve hit terminal velocity. This is where you won’t get any faster (and therefore travel at a constant velocity therefore not accelerating) and is caused when the force of gravity is equal to the force of air resistance (or drag).
~The last example is when the forces are unbalanced. A car is travelling on a motorway and is accelerating because the force propelling the car is greater than the air resistance trying to resist its movement.✌✌
1.) A cricket player lowers his hands while catching the ball.
→ If a player does not lower his hands while catching the ball, the time to stop the ball is very small . So, a large force has to be applied to reduce the velocity of the ball to zero or to change the momentum of the ball. when a player lowers his hands, the time taken to stop the ball is increased
and hence, less force has to be applied to cause the same change in the momentum of the ball.
Therefore, the hands of the player are not injured.
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2.) A Boxer moves his head back ward when his opponent blows a punch .
→ When one boxer blows a punch on the face of another player, then the change in momentum of the punch on striking the face of another player exerts a large force on his face.
On the other hand, when the boxer moves his head back ward, then the change in momentum of the punch of the opponent player takes place in a large interval of time.
Hence, the impact of the punch (i.e , force) on the face of the boxer is very less .
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3.) A karate player breaks the piles of tiles or bricks with a single blow.
→ When a karate player strikes the piles of tiles with his hands, he does so as fast as possible, In other words, the time taken to strike the piles of tiles is very small.
As the momentum of the hand of a karate player reduces to zero when his hands strikes the piles of tiles in very- very small interval of time, therefore, a very large force is exerted on the pile of tiles.
This force is enough to break the pile of tiles.
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