Show:
Balanced and Unbalanced Forces
Newton's Laws
I want more
Miscellaneous
You do the math!!
100
When all forces on an object are balanced, the net force is equal to this.
What is zero
100
This is Newton's First Law, with ALL the important parts included. :0)
What is "Objects at rest will stay at rest, and objects in motion will stay in motion in a straight line at a constant speed, unless acted upon by an unbalanced force."
100
The weight of any object on Earth depends on these two quantities.
What are the objects mass, and the acceleration due to gravity on Earth (9.8 m/s/s)?
100
Forces are vectors, meaning they have both a ___________ and a _____________.
What is magnitude and direction.
100
A 12 kg. cat runs to the right at a constant speed of 2 m/s. This is the amount of force required to make this happen.
What is zero (constant speed means no acceleration, which means no net force).
200
Anytime the forces on an object are NOT balanced, the object will do this.
What is accelerate?
200
This is Newton's Second Law, mathematically speaking.
What is Force = mass X acceleration
200
This is what we really mean when we say "inertia"
What is *tendency to resist changes in motion *tendency to resist accelerations *keep doing whatever its doing *property of matter based on mass and only mass *others????
200
A sledder slows down as her sled glides into the wind across unpacked snow. These are the forces that would be included on free body diagram.
What are gravity, normal force, friction and air resistance.
200
An elephant running through the streets of Grand Island weighs 3000 Newtons. The elephant's mass is approximately this.
What is 300 kg
300
An object can accelerate by doing any one or a combination of these three things.
What is speed up, slow down, change direction
300
A 0.1 kg baseball is popped straight up into the air for a foul ball. These are the values for the baseball's net force, acceleration and velocity AT THE PEAK OF ITS TRAJECTORY.
What is 0.98 N (net force), 9.8 m/s/s (acceleration) and 0 m/s (velocity)/
300
True or False? A force is required to keep an object moving or to change the motion of the object.
What is False.
300
A soccer ball in free fall sails to the right toward the goal after having been head butted by a player. What are the forces acting on the soccer ball during this time.
What is gravity.
300
Spiderman takes a free fall leap off of a skyscraper and falls for 3 seconds before using his spidey sense to grab on to a nearby building. This is his how fast he is going at the end of the three seconds, and this is how far he has fallen by then.
What is 30 m/s (speed) and what is 45 meters (displacement).
400
The ONLY way an object can CHANGE its motion is to become involved with this....
What is an unbalanced force
400
This is the relationship between net force and acceleration, and this is the relationship between mass and acceleration. (choose words or phrases that describe the relationship)
What is direct (net force and acceleration) and what is indirect (mass and acceleration).
400
Suppose an astronaut throws a rock in outer space, far from any sources of gravity or air resistance. This is what you would expect the rock to do.
What is "keep moving in a straight line and at a constant speed" until it is acted upon by some unbalanced force.
400
The force of gravity acting on an object is also known as this.
What is weight.
400
This is the acceleration of a 200 kg cart that has 57000 Newtons of force acting on it.
What is 285 m/s/s
500
An objects acceleration is ALWAYS in this direction.
What is the direction of the net force
500
These are the four fundamental forces in the universe. They are responsible for how everything...from the tiniest particles to the greatest galaxies works....
What are strong nuclear force, weak nuclear force, electromagnetic force and gravitational force.
500
Newton's 3 Laws of Motion describe the behavior of any object. When we consider unbalanced forces, we know the object is __doing this__, when we consider balanced forces, we know the object is ___doing this___.
What is accelerating/changing motion (unbalanced forces) and what is at rest/moving at a constant velocity (balanced forces).
500
Our 5 year old brain has a very hard time really believing Newton's Laws because we live on a planet that cannot escape these 2 unbalanced forces.
What are friction and gravity.
500
A race car accelerates from rest and travels 40 meters in 3.0 seconds with uniform acceleration. This is the net force acting on the car.
What is 6300 Newtons