Forces
A force that OPPOSES motion
Friction
This is an example of what TYPE of friction:
Your shoes gripping the ground before you start walking.
Static
What is Newton's First Law AND its nickname?
The Law of Inertia.
An object in motion will remain in motion, and an object at rest will remain at rest, until acted upon by a force.
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If I have a 4kg box and it is moving to the left 10N and to the right 30N is it
Balanced or Unbalanced AND what is the net force?
Unbalanced and 20 N to the Right
What force is described as universal?
Gravity
Force A is the amount of force required to pull a 20-kg box across a carpeted floor. Force B is the amount of force required to pull the same box across ice. Is it harder to push a box on carpet or ice? Why?
Harder on carpet because it has more friction
A box with a mass of 4 kg is being pushed across the floor. The applied force makes the box accelerate at 2 m/s². The floor creates a friction force of 3 N that opposes the motion.
What is the Net force?
5 N
This an example of what type of friction:
Rubbing your hands together.
Sliding
The formula for Newton’s Second Law is
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If I have a 5kg box and it is moving to the left 6 N and to the left 4 N is it
Balanced or Unbalanced AND what is the net force?
Unbalanced and 10 N to the L
If the masses of objects increase and their distance from each other remains the same, then the force of gravity between the two objects
Increases
A fishing hook is dangling on a line NOT MOVING, what is the net force being seen here?
M = F/A
This is an example of what type of friction:
A bicycle wheel eventually coming to a stop.
Rolling
Explain Newtons second law in your own words
Answers may vary
(The more mass something has the more force is needed to move it)
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If I have a 100 kg ball and it is moving to the right 200N and to the right 30N is it
Balanced or Unbalanced AND what is the net force?
Unbalanced and 230 N to the right
A calculator is placed on a table. While the calculator exerts a downward gravitational force on the table, the table
exerts an equal upward force on the book
What is Miss Guys favorite dip
Queso
What is the rate of change of velocity?
Acceleration
This is an example of what type of friction:
A swimmer moving through water.
Fluid
Explain Newtons Third Law in your own words
Answers may vary
(Each action has an equal and opposite reaction)
A force of 250 N is applied to an object that accelerates at a rate of 5 m/sec2. What is the mass of the object?
50 kg
What type of force is equal and not moving
A Balanced Force.
What happens when a balanced force acts on an object?
What is a force?
A push or pull on an object
A student slides the same shoe across a carpeted floor and then across an icy surface. On which surface will the shoe experience more friction, and why?
Carpet because it is harder to move, more friction
Elena paddles her kayak through the lake. As she pushes the paddle backward against the water, the kayak moves forward. What Law is this?
Newtons Third Law
If a 60 kg person on a 15 kg sled is pushed with a force of 300 N, what will be the acceleration?
4 m/s2
What has more gravitational force? School bus or a human? Why?
School bus because it has a larger mass
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You have an otter pulling a fish 500 N to the left and an otter pulling the same fish 501 N to the right. What direction will the fish go and how do you know?
It will go 1 N to the right because there is more force on that side