By Dylan Lane 1st hour

About Isaac Newton Isaac Newton was the founder of the three laws at the age of 23 in The laws were not presented to the public until 20 years later in Isaac Newton was the founder of the three laws at the age of 23 in The laws were not presented to the public until 20 years later in 1686.

Newton's 1 st Law Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.

Examples Newton’s First Law Applied to Rocket Liftoff “Every object persists in its state of rest or uniform motion in a straight line unless it is compelled to change that state by forces impressed on it.” “Every object persists in its state of rest or uniform motion in a straight line unless it is compelled to change that state by forces impressed on it.”

Examples Newton’s First Law Applied to Rocket Liftoff Before Fireing Object in state of rest, airspeed zero. Engine Fired Thrust increases from zero. Weight decreases slightly as fuel burns.

Examples Newton’s First Law Applied to Rocket Liftoff When Thrust is greater than Weight. Net force (Thrust-Weight) is positive upward. Rocket Accelerates upward. Velocity increases.

Newton’s 2 nd law An unbalanced force acting on an object causes it to accelerate An unbalanced force acting on an object causes it to accelerate F=ma (force=mass times acceleration) F=ma (force=mass times acceleration)

Examples This is an example of how Newton's Second Law works: This is an example of how Newton's Second Law works: Mike's car, which weighs 1,000 kg, is out of gas. Mike is trying to push the car to a gas station, and he makes the car go 0.05 m/s/s. Using Newton's Second Law, you can compute how much force Mike is applying to the car. Mike's car, which weighs 1,000 kg, is out of gas. Mike is trying to push the car to a gas station, and he makes the car go 0.05 m/s/s. Using Newton's Second Law, you can compute how much force Mike is applying to the car. Answer = 50 Newtons Answer = 50 Newtons This is an example of how Newton's Second Law works: This is an example of how Newton's Second Law works: Mike's car, which weighs 1,000 kg, is out of gas. Mike is trying to push the car to a gas station, and he makes the car go 0.05 m/s/s. Using Newton's Second Law, you can compute how much force Mike is applying to the car. Mike's car, which weighs 1,000 kg, is out of gas. Mike is trying to push the car to a gas station, and he makes the car go 0.05 m/s/s. Using Newton's Second Law, you can compute how much force Mike is applying to the car. Answer = 50 Newtons Answer = 50 Newtons

Newton’s 3 rd law For every action (force) there is an equal and opposite reaction. For every action (force) there is an equal and opposite reaction. For every action (force) there is an equal and opposite reaction.

Examples The two football players collide. This is an example of Newton's third law because the player in the blue jersey is tackling the guy moving in the opposite direction therefore there is an equal and opposite reaction. The two football players collide. This is an example of Newton's third law because the player in the blue jersey is tackling the guy moving in the opposite direction therefore there is an equal and opposite reaction. The two football players collide. This is an example of Newton's third law because the player in the blue jersey is tackling the guy moving in the opposite direction therefore there is an equal and opposite reaction.

Summary Newton’s 1 st law: An object at rest tends to stay at rest unless acted upon. Newton’s 1 st law: An object at rest tends to stay at rest unless acted upon. Newton’s 2 nd law: F=ma (force=mass times acceleration) Newton’s 2 nd law: F=ma (force=mass times acceleration) Newton’s 3 rd law: For every action (force) there is an equal and opposite reaction. Newton’s 3 rd law: For every action (force) there is an equal and opposite reaction. Newton’s 1 st law: An object at rest tends to stay at rest unless acted upon. Newton’s 1 st law: An object at rest tends to stay at rest unless acted upon. Newton’s 2 nd law: F=ma (force=mass times acceleration) Newton’s 2 nd law: F=ma (force=mass times acceleration) Newton’s 3 rd law: For every action (force) there is an equal and opposite reaction. Newton’s 3 rd law: For every action (force) there is an equal and opposite reaction.