Definitions
Definitions
Definiton
Questions
NJ Ask Questions
100
a change in an object's speed or direction;acceleration
What is acceleration
100
the acceleration of an object is related to the net force acting on it and the mass of the object.
What is Newton's second law of motion
100
a push or pull that causes something to change its motion
What is force
100
If you hit the home run in space, what would happen?
What is a baseball will keep moving in outer space until its acted on by another force
100
Sean pushes a parked car with a force of 80 newtons. The car does not move. Which of the following best describes the force that the car exerts on Sean.
What is the same amount of force as Sean exerts.
200
a force that must touch an object to change its speed and or direction
What is a contact force
200
for every action, there is an equal and opposite reaction
What is Newton's third law of motion
200
a force that occurs when two things move past each other and rub together
What is friction
200
The net force acting on an object is 0 N. Which of the following best describes the motion of an object?
What is The object is not moving
200
Which force has the greatest influence on the structure of solar systems and galaxies.
What is gravity
300
the tendency of objects to keep doing what they are doing
What is inertia
300
a force that acts on an object to change its speed or direction from a distance
What is non contact force
300
the metric unit used to measure force or weight
What is newton
300
Suppose that Sharon rides her bike at a speed of 10 m/s. As she rides up a hill, her speed decreases to 5 m/s. Is her acceleration positive or negative?
What is her acceleration is negative because she's going against the force of gravity
300
Zack throws a ball straight up into the air. The height of the ball at different times is shown in the table below.
What is 15 m/s
400
the amount by which the opposing forces acting on an object are unequal
What is net force
400
the force that pushes up to support the weight of an object
What is normal force
400
Gabe kicked a soccer ball across a field. The ball rolled for awhile but eventually stopped. If Newton's first law is true, it seems that the ball Gabe kicked should continue rolling forever. Why does the ball stop?
What is Friction from the ground makes the ball stop rolling
400
Which of the following i an example of a contact force?
What is friction
400
In outer space, a small ball of rock and ice travels for thousands of years. Its motion does not change in any way during that time. As it approaches the solar system, however, it comes under the influence of the Sun's gravity, and its motion begins to change. Which principle does it demonstrate?
What is An object in motion moves in a straight line at constant speed until acted on by a net force.
500
if the forces acting on an object are balanced, the object will continue doing what it is doing
What is Newton's first law of motion
500
a force that acts without physical contact to pull two object toward each other
What is gravity
500
Suppose you are playing baseball and hit a home run. What forces slow down the ball while it is in motion?
What is friction and gravity slows a baseball down while its in motion
500
In which situation are the forces acting on the object balanced?
What is a hot air balloon rises at a constant speed
500
Tamara rode her bicycle to her friend's house. The distance-time graph shown above represents Tamara's trip. Describe Tamara's speed and the net force acting on her bicycle between 15 and 20 min. Include the proper units.
What is the first 5 minutes she traveled 1.5 km. Then she stayed the same speed for 10 minutes. Lastly after 5 minutes she traveled 3 more km.
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