QQ: What is the upward acceleration

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Presentation transcript:

QQ: What is the upward acceleration of a helicopter with a mass of 5000 kg if a force of 10,000 N acts upon it in an upward direction? 2. An automobile with a mass of 1200 kg accelerates at a rate of 3.0 m/s2 in the forward direction. What is the net force acting on the automobile? 3. A 60.0 kg person walks from the ground to the top of a 74.8 m tall building. Calculate her potential energy.

Today’s Objective: I can describe motion using Newton’s Law’s of Motion.

What is the big concept Newton described in his first law of motion?

Hyperlink myhbusters

What is the big concept Newton described in his second law of motion?

Aldo is lucky enough to be the first astronaut from MHS Aldo is lucky enough to be the first astronaut from MHS. On earth he has a mass of 88 kg and weighs 863 N. On the moon he weighed 141 N. The acceleration due to gravity on Mars is 3.7 m/s2. How much does he weigh on Mars?

And finally…. Newton’s 3rd Law of Motions

Newton’s Third Law of Motion Whenever an object exerts a force on a second one, that object exerts an equal and opposite force back. Newton’s Third Law of Motion

When Action – Reaction forces do not cancel This means movement can and does occur

Movement occurs in direction of greatest vector All forces are equal  no movement

Net Force: (Newton’s 3rd law) Uses vector addition to predict a body’s motion Vectors are equal so no movement Unequal vectors show movement of object

Reaction Pairs: the opposing forces always come in pairs

Vector  Momentum: mass in action Amount of force it would take to stop a moving object Vector 

Momentum = Mass x Velocity p = mv p = Momentum m = mass V = velocity

Ivonne loves her motorcycle Ivonne loves her motorcycle. Its mass is 325 kg and she is riding along 140 km/h, south. Find its momentum.

Conservation of Momentum Law of Conservation of Momentum The total momentum of 2 objects is equal before and after a collision.

The total momentum of 2 objects is equal before and after a collision.

6600 6600 800kg * 2 m/s = 1600 kgm/s 1000kg * 5 m/s = 5000 kgm/s 800kg

Newton's Cradle

NHL Physics?

Coming up Friday!!!!!! Unit Test over: Motion and Newton’s Laws