Tendency of an object to resist a change in motion.
100
What does the acceleration of an object depend on?
force and mass
100
State Newton's third law.
Every action has an equal and opposite reaction.
200
The SI unit for force is the...
the newton
200
What 2 factors does friction depend on?
type of surface and how hard they push together
200
State Newton's first law.
An object at rest will remain at rest. An object in motion will remain in motion. unless acted upon by an UNBALANCED force!
200
What is the equation for acceleration?
acceleration = force / mass
200
Give an example of Newton's third law.
rockets going up, kayaks moving forward
300
Unbalanced forces result in:
motion
300
Name the 4 types of friction and give an example of each.
static, sliding, rolling, fluid
300
Give an example of the first law of motion.
space junk!
300
Find the force it would take to accelerate an 800 kg car at a rate of 5 m/s/s.
force = mass x acceleration = (800) ( 5) = 4000 N
300
If forces are equal and opposite, why does a volleyball fly up but the players arm does not fly down?
The mass of the player is greater than that of the volleyball.
400
Find the net force in the following situation: A rhino and a hippo are fighting. The hippo charges forward with a force of 25 N. The rhino charges in the opposite direction with a force of 20 N.
net force = 5 N
400
How does mass differ from weight?
mass = amount of stuff, weight = stuff + gravity
400
What is the main thing that inertia depends on?
Mass- An empty dresser is easier to move than a full one.
400
What is the name of one of Megan's 4 siblings?
Travis, Ricky, Stephanie, Nicole
400
Calculate the momentum of a baseball (50g) traveling at 60 km/s.
3000 g *km/s
500
What is a newton equal to? (like m/s?)
kg*m/s/s
500
What is the acceleration due to gravity and at what point (if ever) does a falling object stop accelerating?
9.8 m/s/s
It stops accelerating when the air resistance (a form of fluid friction) equals the force of gravity.
500
What is the name of Megan's first dog?
Kiva
500
Find the mass of a roller coaster that accelerated at a rate 60 m/s/s after experiencing a net force of 360 N.
6 kg
500
Why do 2 colliding tennis balls in a space station slow down when thrown together (and they stick together) ?
Because momentum must stay constant but the mass has doubled. Therefore velocity must slow by 1/2.