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Newton's laws of motion
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If you are not wearing a seatbelt and your car crash you can be ejected from the car. This is an example of
Newton's first law
You rolled a marble down the ramp. It hit a cup causing the cup to move backwards. Which law of motion is this an example of?
Newton's 3rd Law
Your car is spinning tires in your icy driveway. What type of friction are you lacking?
rolling friction
What is force measured in?
Newtons
What is mass measured in?
Kg
What units is acceleration measured in?
m/s2
what are the two forces that stop an object in motion?
friction and gravity
A10 kg bowling ball would require what force to accelerate down an alleyway at a rate of 3 m/s2?
30 N
What is the mass of a falling rock if it produces a force of 147 N?Acceleration of gravity is 9.8m/s2
15kg
What is the acceleration of softball if it has a mass of 0.5 kg and hits the catcher's glove with a force of 25 N?
50 m/s2
What is newton's first law?
An object in motion stays in motion, an object at rest stays at rest unless acted upon by an unbalanced force.
What is Newton's 2nd law?
Force = Mass x Acceleration
An apple fell fro a tree at the rate of 2 m/s2 and hit my head with the force of 3N. What is the mass of the apple?
1.5kg
Why did the golf ball push the cup farther than the other balls in the conservation of momentum lab?
because it had more momentum
What is inertia?
An objects resistance to a change in motion
How do we describe force?
a push or a pull
When two teams are playing tug of war and neither team wins. What can you say about the forces?
they are balanced
When you kick a soccer ball and it moves the forces are _________ (balanced or unbalanced)
unbalanced
The force that causes objects to move in a circle is
centripetal force
How does the law of inertia effect the passengers in a car that is suddenly slowing down? (what will happen to the passengers)
They are abruptly pushed forward as their body wants to continue at the same speed as the train was traveling.