Newton's Laws
Which has more inertia- a golf ball or a baseball?
A baseball!
What is the difference between balanced and unbalanced forces?
An unbalanced force causes an object to move. Balanced forces keep an object at rest.
What is a free body diagram used for?
To show all of the forces acting on an object
An object is slowing down
Which law of motion deals with balanced and unbalance forces
Newton's 1st Law
Explains why a it takes more force to move a loaded shopping cart that what it takes to move it when it is empty.
Newton's 2nd Law tells us that more mass= more force to move an object
What would happen if two equally matched teams played tug of war? Why?
The rope would not move, the forces are balanced
In a free body diagram, how are forces represented?
Vectors!
What does a steep slope on a distance-time graph represent?
Something is moving fast
Give a real-world example of Newton's 3rd Law
(Answers will vary)
What happened when you added more weight to your balloon car? Which law does this apply to?
The car did not move as far or as fast. Newton's 2nd law tells us more force is required to move an object with more mass.
Name 4 different forces we have discussed
Normal, gravity, air resistance, applied force, friction
If gravity pushes down on an object sitting on the floor with the force of 10 N, how much force is being applied to the object by the floor
10 N
How can you tell if an object is at rest on a distance-time graph?
Straight (horizontal) slope
The property of matter that describes an objects tendency to move in a straight line
What is 'interia'?
The reason grown-ups often choose the “inside” seat when riding an amusement park ride with small children, especially if it has sharp turns in one direction..
Inertia! (Newton's 1st Law)
How does friction affect motion?
Friction will slow an object down
If a force of 20N is applied to the left side of a box and a force of 50 N is applied to the right side of the box, what is the net force?
30 N to the right
How can you identify acceleration from a velocity-time graph?
A curved slope
If you push on a wall with a force of 30 N, how much force is the wall exerting on YOU?
30 N
answers vary
Which force opposes an applied force?
Friction
Describe a scenario where an object would have a net force of 20 N to the right
answers vary
What does a curved negative slope mean on a velocity-time graph
The object is decelerating
4 vehicles with different mass are moving at the same speed
A: 2000kgs
B:1000 kgs
C:1500 kgs
D: 1200 kgs
If the same braking force is applied to all the vehicles, which car will slow down the fastest ?
Car B- 1000kgs