Activity 38 Newtons Second Law of Motion Newtons

Newton’s Second Law of Motion nd 2 Newton’s Law of Motion States… • An

Wagon moves this way Unbalanced Force Applied

• You might unconsciously know the Second Law. Heavier objects require more force

Force, Acceleration, and Mass • The greater the force applied to a given object,

Newton’s Second Law in Real Life • Using Newton’s second law of motion, explain

Formula for Newton’s Second Law of Motion • FORCE = MASS x ACCELERTATION •

What does F = ma say? F = ma basically means that the force

Newton’s second Law con’t. F= M x A Force = Mass x Acceleration the

• This is an example of how Newton's Second Law works: Mike's car,

Examples • What force is needed to push a 2 10 kg shopping cart

Question • Identical twins are riding in identical wagons. A friend gives the first

Question • Would a car towing a boat take less, the same, or more

Question • What will happen to the acceleration of an object if the mass

Question • If two identical objects accelerate at the same rate, what must be

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Activity #38: Newton’s Second Law of Motion

Newton’s Second Law of Motion nd 2 Newton’s Law of Motion States… • An unbalanced force acting on an object causes the object to accelerate in the direction of the force.

Wagon moves this way Unbalanced Force Applied

Force, Acceleration, and Mass • The greater the force applied to a given object, the greater its acceleration.

Newton’s Second Law in Real Life • Using Newton’s second law of motion, explain why larger trucks usually need more distance to stop than do smaller trucks.

Formula for Newton’s Second Law of Motion • FORCE = MASS x ACCELERTATION • F =force, m= mass, and a =acceleration.

What does F = ma say? F = ma basically means that the force of an object comes from its mass and its acceleration. Something very massive (high mass) that’s changing speed very slowly (low acceleration), like a glacier, can still have great force. Something very small (low mass) that’s changing speed very quickly (high acceleration), like a bullet, can still have a great force. Something very small changing speed very slowly will have a very weak force.

Newton’s second Law con’t. F= M x A Force = Mass x Acceleration the units: • force is measured in Newtons (N) • mass is measured in kilograms (kg) • acceleration is measured in meters per second (m/s 2) 12/12/2021 9

• 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. 5 m/s 2. Using Newton's Second Law, you can calculate how much force Mike is applying to the car. 12/12/2021 copyright 2006 www. brainybetty. com; All Rights Reserved. 10

• F=Mx. A • F= 1000 kg x. 5 m/s 2 • F= 500 k x m/s 2 • F= 500 N http: //www. classzone. com/books/ml_science_com p/page_build. cfm? id=none&mod=13 copyright 2006 12/12/2021 www. brainybetty. com; All Rights Reserved. 11

Question • Identical twins are riding in identical wagons. A friend gives the first wagon a stronger push than the second. Which twin will experience greater acceleration?

Question • Would a car towing a boat take less, the same, or more time to accelerate than it would without the boat? Explain.

Question • What will happen to the acceleration of an object if the mass decreases and the force is constant?

Question • If two identical objects accelerate at the same rate, what must be true of the force applied to each object?