4-1
An object is in motion when?
When it is in comparison to another object
What is the formula for the speed of an object?
Speed=Distance/Time
What is another name for Newton's first law?
The law of Inertia
What is the difference between mass and weight?
weight can change but mass always stays the same
If a mouse were to sit on top of your head would the force from the mouse change your motion
no
What is the formula for acceleration?
Acceleration= Final Speed- Initial speed/ Time
What formula do you use to calculate force?
Net force= Mass * Acceleration.
What are the two factors that affect friction?
The two types of surfaces involved and how hard the surfaces are pushed together affect friction.
What is a force and how does it affect your motion?
A force is a push or a pull and it affects motion because when an object pushes a force onto another if it is strong enough the object will move.
What does acceleration mean when it's used as a term (there are two definitions)?
Acceleration is any change in speed or any change in direction.
What did Newton state in his second law?
He stated that an object's mass directly influences how much force is needed to accelerate the object.
What are all the types of friction?
Rolling friction, Static friction, Sliding friction, and Fluid friction.
If two elephants were pulling a box in opposite directions, what would the net force be if the elephant on the left pulled with 50 newtons and the one on the right pulled with 60 newtons?
The net force would be 10
If a racecar is going 50 m/s then at the end of the race it has a speed of 200 m/s and the total time it took him to end the race was 50 seconds what would the acceleration be?
3 m/s2
Why are action-reaction forces not balanced? give an example.
Both forces are acting on different objects (ex: if you kick a ball you force the ball and the ball forces on you so they are acting on different objects making it unbalanced).
If a whale weighed 1,500 lbs how much would it weigh on the moon if on the moon it would way one-sixth of its weight?
250 lbs.