the law of motion
Newton's second law of motion states that acceleration is produced when a force is applied to an object. The more mass an object has, the greater the force is needed to accelerate an object.
F=MA
Force= (Mass) (Acceleration)
pressure
Pressure is defined as force per unit area. The smaller the area, the less force is needed to create pressure.
P= F/A
Pressure= (force)(area)
P= F/A
Pressure= (force)(area)
In Football
When a football player tackles another player, a force is applied due to the mass of the football player, and the acceleration needed to tackle another player. For example, if a player is running (more acceleration) and hits someone standing still (less acceleration) there is a greater amount force acted onto the player standing still.
Review questions
A football player weighs roughly 138 kg. How much force is required for him to accelerate at a rate of 5 m/s^2 down the field?
690 N
If a football player is attempting to tackle another football player who is twice his mass, would he need more, less, or the same amount of force to tackle him?
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