Question | Answer |
amount of ---- in an object | matter |
a push or pull | force |
when an object speeds up, slows, down. or turns | acceleration |
tendency of an object to resist a change in its motion | intertia |
a measure of how difficult it is to stop a moving object | momentum |
the SI metric unit of force and weight | newton |
represents force in science | arrows |
unequal force = movement + occurs | unbalanced force |
equal forces - no movement | force |
acceleration = (sf - si)
time | acceleration formula |
What does acceleration change? | direction and speed |
What does momentum measure? | how hard it is to stop an object |
when your speed decreases
Ex. when your speed changes from 10 mph to 6mph | negative acceleration |
Explain how mass and weight are affected when you travel to the moon? | Mass is constant and weight changes because there is less gravity on the moon |
a = sf + sli
t | word problems - acceleration |
evidence of the pull of gravity between the moon and the earth
(rise and fall of water) | tides |
a truck and a bicycle have the same momentum. which one would be harder to stop? | the truck because the mass and inertia are greater |
list 3 examples of forces that cannot be seen | magnetic, electric, gravity |
to have momentum what must an object be doing | moving |
3 ways to accelerate | speed up, slow down, change direction |