What could be another term for drag? a) Sliding friction b) Fluid friction c) Balanced force d) Unbalanced force

Which type of force is not acting on the falling leaves? a) Air resistance b) Gravity c) Fluid friction d) Rolling friction

The 3 Laws of Motion

Newton’s 3 Laws of Motion 1 st Law of Motion (“Law of Inertia”) 1 st Law of Motion (“Law of Inertia”)

Newton’s 3 Laws of Motion Sir Isaac Newton Sir Isaac Newton English mathematician English mathematician Discovered 3 basic laws Discovered 3 basic laws of motion

Newton’s 3 Laws of Motion 1 st Law of Motion (“Law of Inertia”) 1 st Law of Motion (“Law of Inertia”) Inertia = an object tends to resist change in its motion Inertia = an object tends to resist change in its motion Eureka Inertia

Newton’s 3 Laws of Motion 1 st Law of Motion (“Law of Inertia”) 1 st Law of Motion (“Law of Inertia”) Inertia = an object tends to resist change in its motion Inertia = an object tends to resist change in its motion Amount of inertia Amount of inertia depends on object’s mass

Which ball has the most inertia? a) Golf ball b) Tennis ball c) Soccer ball d) Bowling ball

Newton’s 3 Laws of Motion 1 st Law of Motion (“Law of Inertia”) 1 st Law of Motion (“Law of Inertia”) Law says: Law says: “An object at rest will stay at rest and an object moving with a constant velocity will continue moving with that constant velocity unless acted on by an unbalanced force.” No unbalanced forces Ball at rest Foot = unbalanced force Ball accelerates

What would a flying airplane be doing if the forces of thrust and drag are balanced? a) Sitting still b) Moving at a constant speed c) Accelerating d) The forces of thrust and drag cannot be balanced

Where on the graph is the turtle experiencing unbalanced forces? a) Between A & B b) Between C & D c) Between B & C d) Between A & B and between C & D

Newton’s 3 Laws of Motion 2 nd Law of Motion (“F = ma”) 2 nd Law of Motion (“F = ma”)

Newton’s 3 Laws of Motion 2 nd Law of Motion (“F = ma”) 2 nd Law of Motion (“F = ma”) The more mass an object has, the more force is needed to move it The more mass an object has, the more force is needed to move it

Newton’s 3 Laws of Motion 2 nd Law of Motion (“F = ma”) 2 nd Law of Motion (“F = ma”) The more mass an object has, The more mass an object has, the more force is needed to move it The more force you put The more force you put on an object, the more it will accelerate

What happens to the sled when you add a second sled dog? a) The sled’s mass will be cut in half. b) The sled’s mass will double. c) The sled’s acceleration will be cut in half. d) The sled’s acceleration will double.

Newton’s 3 Laws of Motion 2 nd Law of Motion (“F = ma”) 2 nd Law of Motion (“F = ma”) Law says: Law says: “The amount of force on an object is equal to the object’s mass times its acceleration.” force = mass x acceleration force = mass x acceleration acceleration = force / mass acceleration = force / mass

How much force is needed to accelerate a 3 kg skateboard at 5 m/s 2 ? What is the correct way to plug in the numbers? a) F = 3 kg + 5 m/s 2 b) F = 3 kg x 5 m/s 2 c) F = 3 kg ÷ 5 m/s 2 d) F = 5 m/s 2 ÷ 3 kg

How much force is needed to accelerate a 3 kg skateboard at 5 m/s 2 ? a) 8 N b) 8 kg c) 15 kg d) 15 N

How do you plug in the numbers to find the sled’s acceleration? a) A = 100N ÷ 50kg b) A = 100N x 50kg c) A = 50kg ÷ 100N d) A = 50kg x 100N

What is the sled’s acceleration? 1. 2 m/s m/s m/s m/s 2

What would happen to the sled’s acceleration if the load doubled to 100kg? a) The acceleration would double. b) The acceleration would stay the same. c) The acceleration would be cut in half. d) The sled would not move.

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Newton’s 3 Laws of Motion 3 rd Law of Motion (“action-reaction”) 3 rd Law of Motion (“action-reaction”)

Newton’s 3 Laws of Motion 3 rd Law of Motion (“action-reaction”) 3 rd Law of Motion (“action-reaction”) When you push on When you push on an object, that object also pushes back on you

Newton’s 3 Laws of Motion 3 rd Law of Motion (“action-reaction”) 3 rd Law of Motion (“action-reaction”) Law says: Law says: “If one object exerts a force on another object, the second object exerts an equal force back on the first object.”

How does pushing backwards on water allow you to swim? a) You push the water out of your way. b) Water doesn’t have any force. c) When you push the water backward, it pushes you forward with more force. d) When you push the water backward, it pushes you forward with the same force.

1st Law Music Video 2nd Law Music Video 3rd Law Music Video