Objects at rest remain at rest until an unbalanced force acts on them.
100
What is the force that opposes motion?
Friction
100
What is speed?
speed is Distance over Time!!
200
Which Scientist Discovered the connection between objects falling to earth, and the movement of the stars, and objects in the night sky?
Isaac Newton
200
In a vacuum chamber, which hits the earth first when dropped at the same time? a Piece of paper, or a pencil?
Both at the same time.
200
According to which of Newtons Laws, would state that the force, mass, and acceleration are all related?
Newtons Second Law.
200
What is one way we try to reduce Friction?
Oiling, greasing, ball bearing, wheels, smooth surfaces, etc.
200
What is Velocity?
Distance over time (speed) with a direction
300
What was the falling object Newton observed that gave him the idea of universal Law of gravitation.
Apple
300
What is the term for when falling objects reach a constant velocity?
Terminal Velocity
300
Which would require a greater force to accelerate a 10kg Bike, or a 15 kg tricycle?
15 kg Tricycle.
300
What do we call friction if the object is not moving?
Static Friction
300
How can you have constant Acceleration?
Travelling in a circle
400
If all objects fall to earth at the same rate of Acceleration, how does a parachute work.
Air drag, Air resistance.
400
What is the Acceleration due to Gravity if the time a takes a boulder to reach a velocity of 10 m/s down is 20 seconds?
V=gxt
.5 m/s squared
400
How much force is needed to move a 100 kg wheelbarrow, to an acceleration of 10m/s Squared
f=mxa
1000 Newtons
400
What happens when you have a block on a slope but it is not sliding downwards?
The static Friction is stronger than the force of gravity.
400
If a falling object has reached terminal velocity, is it traveling with continuous acceleration?
No
500
How do astronauts simulate antigravity?
By flying a plane straight down to the earth.
500
If Mr. Hageman jumped off his desk what would his velocity be after .25 seconds?
v=gxt
2.45 m/s
500
If I applied 1500 newtons on a 1280 kg car what would its acceleration be?
f=mxa
What is 1.17 m/s squared
500
Since Momentum is conserved would you want a lot of friction between your shoes and the court when playing basketball? or would you want little friction?
you want a Lot of Friction!!
500
What is a elastic Collision?
a collision where the two colliding objects stay together.