Show:
The Nature of Force
Friction and Gravity
Newton's Laws of Motion
Momentum
Free fall and Circular Motion
100
a push or a pull
What is force?
100
a force that pulls objects towards each other (i.e a skydiver towards the earth)
What is gravity?
100
resistance to a change in motion
What is inertia?
100
Which object would have more momentum: a bowling ball or a pingpong ball?
What is bowling ball?
100
the motion where the acceleration is caused by gravity
What is free fall?
200
The SI unit of force
What is a Newton?
200
This type of friction happens in air or water
What is fluid friction?
200
The equation for determining acceleration (newton's 2nd law)
What is acceleration = net force/mass
200
the equation for momentum
What is momentum = mass x velocity
200
objects that orbit around other objects in space and follow a curved path around Earth
What are satellites?
300
the total amount of force being acted on an object
What is net force?
300
This type of friction acts between objects that aren't moving
What is static friction?
300
Newton's first law of motion says that an object at rest will remain at rest unless acted upon by a ____________________
What is nonzero net force?
300
What is the momentum of a 20 kg dog running at a speed of 8 m/s?
What is 160 kg x m/s?
300
a force that causes an object to move in a circular path
What is centripetal force?
400
An object will change motion when this type of net force acts on it:
What is nonzero net force?
400
This type of friction occurs when two solid surface slide over each other
What is sliding friction?
400
Newton's third law says that fro every action there is an equal and _____________ reaction.
What is opposite?
400
The more momentum an object has, the (easier/harder) it is to stop
What is harder
400
acceleration due to gravity
What is 9.8 m/s?
500
What is the net force on a box if one person is applying 15N force to the right and another person is applying 10N force to the left?
What is 5N to the right?
500
Friction always acts in the (same/opposite) direction of motion.
What is opposite?
500
What is the net force on a 2kg (mass) skateboard accelerating at a rate of 2m/s (acceleration)?
What is 4N?
500
The total momentum of any group of objects (remains to same/will always change) unless outside force act of the objects.
What is remains the same?
500
An object traveling in a circle is accelerating because it is constantly changing _________.
What is direction?