Forces
What is the unit for force?
Newton's (N)
What is the metric unit for speed? (two things)
m/s
meters per second
What is the definition of net forces?
The SUM of all the forces acting on an object
How many Laws of Motion are you?
3
What are the two forces that affect the motion of a projectile
Air Resistance + Gravity
What units are used for Mass in the force equation?
Kg
Kilograms
Rewrite the Speed equation to solve for the distance traveled.
Speed=Distance/Time
*(use algebra to get Distance alone on one side)
YES
Speed = Distance / time
Distance = Speed x time
When do you SUBTRACT force arrows?
When force arrows are pointing in opposite directions
What is Newtons 3rd Law of Motion?
For every action has an equal and opposite reaction
What is the term for a Vector?
Arrow showing the direction and magnitude of a moving object.
A 0.3kg dog is sprinting with an acceleration of 13 m/s2 and the
How much force does the dog have?
F = m x a
F = 0.3 x 13
F = 3.9 N
How long did it take Jamal to run the 40-meter spring if he was running at 12.5 m/s?
Time = Distance / Speed
T = D/s
time = 3.2 seconds
TRUE!
What is Newton's 1st Law of Motion?
An object at rest will remain at rest, and an object in motion will remain in motion unless acted on by an outside forces/unbalanced forces
What is the best angle for a projectile to travel the furthest possible distance, assuming no fluid friction (air resistance)
45 degrees
How much force is required for a 12 kg Dog to accelerate at 4 m/s/s ?
Mass. x Acceleration = Force
12kg x 4 m/s/s = 36 N
Find the speed of a rabbit that hopped 33 meters in 8 seconds.
S = D / t
S = 33 / 11
S = 4.125 m/s
**Units or it is WRONG!!
What is the net force acting on the box?
5 N - 2N = 3N
3 N right
What formula is associated with Newton's 2nd Law of Motion?
F = m x a
Force = mass x acceleration
What are the names of the three different parts of a rocket? (it was in the video)
Nosecone, Fuselage, Fins
The tiger is running with a force of 10 N and has an acceleration of 2 m/s2?
What the MASS of the tiger?
F = m x a
F = m x a --> Rearrange equation to solve for mass
m = F/a
m = 10N / 0.2 m/s2
m = 5 kg
How fast does sound travel in the air?
Does sound travel faster in Air or in Water? Why?
343 m/s
In water because the substance is denser allowing particles knocking into each other to transmit the sound waves quicker
When an object experiences no change in velocity that object is said to have ______ forces acting on it.
Balanced
Give a real life example of Newton's 3rd Law of Motion
For every action has an equal and opposite reaction
draw the shape of a projectile that has the least possible air resistance. (drag coefficient of 0.04)
Water droplet shape