Newtons Laws Foldable 9 1 st Law of

Newton’s Laws Foldable #9

1 st Law of Motion: Law of Inertia Outside 2 nd Law of Motion: Law of Acceleration 3 rd Law of Motion: Law of Action. Reaction

Inside net force – combination of all forces balanced force – net force is 0 unbalanced force – net force is not 0 inertia – tendency of object to resist change in motion circular motion – any motion in which an object is moving along a curved path centripetal force – force is perpendicular to circular motion 1 st Law: If the net force on an object is zero, the motion of the object does not change; if it is not zero it will change 2 nd Law: The acceleration of an object is equal to the net force acting on the object divided by the object’s mass a=F F = ma m=F m a Units: a = m/s 2; F = N; m = kg Leave blank for next week.

On the back Show your work for the problems on the next slide here. Leave blank for next week

Practice Problems 1. A bowler rolls a 5 kg bowling ball down a magical frictionless bowling alley. The ball accelerates at an average rate of 2 m/s 2. How much force did the bowler apply to the ball? 2. A pitcher throws a 0. 142 kg baseball, which accelerates at a speed of 9 m/s 2. How much force does the pitcher apply to the ball? 3. 0. 048 Newtons of force are applied to a 0. 012 kg weight, which slides across a frictionless surface. How fast does the weight accelerate? 4. A kid applies a force of 27 Newtons to a 9 kg wagon. How fast does it accelerate? 5. Sven the fish-thrower throws a 15 kg fish into the ocean. It accelerates at a rate of 3 m/s 2. How much force did Sven apply to the fish?

Rea d ans to que wer stio ns Virtual Lab #10