Vocabulary
Friction
force acting against the movement of object between the object and the surface that it is moving on
If two things collide, they experience _________ force in ___________ directions
equal; opposite
A red ball going 10m/s experiences a force and has an ending velocity of 12 m/s
A yellow ball going 4m/s experiences a force and has an ending velocity of 8m/s.
Which one experienced the greater force assuming they have the same mass?
yellow
If you add wheels to a cart, what does this do to the amount of friction acting on the cart?
True or False: understanding cause-and-effect can help you make inferences
true
If two objects of different mass collide, which object is most affected by the collision?
the one with less mass
You have two people playing tug-of-war. The one on the left is pulling with 175 newtons of force while the one on the right is pulling with 200 newtons of force. In which direction will the rope go?
the right
True or false: greatest change in velocity and greatest ending velocity mean the same thing
false
How does friction affect velocity?
slow down
Mass
WEIGHT is an incorrect answer
amount of matter in an object
If two objects of equal mass hit each other, they will go backwards ____________ distance
a. the same
b. different
same
If objects of the same mass change velocity by the same amount, what does this tell you about the amount of force used on them?
the amount of force was the same
True or False: it requires the same amount of force to speed up an object than to slow it down
true
Who came up with the laws of motion?
Sir Isaac Newton
Velocity
Two objects collide. One has a mass of 10kg, and the other a mass of 20kg. Which one experiences the greater force? Why?
Neither because they both experience the same force from the impact
If you want an object to be easier to push across the floor, what can you do?
decrease the mass or the friction
If an object is moving in space, it will continue moving forever. Why?
there's no friction or gravity
what happens if you apply force in the opposite direction of movement?
slow down, stop, or change direction
distance divided by time
Two objects collide. One has a mass of 10kg, and the other a mass of 20kg. Which one experiences the greater change in velocity after colliding? Why?
the 10kg one because it has less mass
If you have two objects: one with 100kg of mass and another with 3kg of mass. Both of them change velocity by 2m/s. Which one had a greater force exerted on it?
the 100kg one
What is the relationship between mass, force, and velocity?
- As mass increases, velocity _________
-As force increases, velocity ________
In order to start moving, what direction must you apply force?
any