Show:
Forces
Inertia
Momentum
Newton
Miscellaneous
100
In physical science, a force is defined as a _________.
push or pull
100
The tendency of an object to resist a change in motion is ______.
inertia
100
The product of an object's mass and velocity is called its _________.
momentum
100
According to Newton's third law of motion, the strength of a reaction force is ______ the strength of the action force.
equal to
100
_____ is the force exerted between two objects when they rub against each other.
friction
200
The SI unit for force is the what?
newton
200
The greater the mass of an object, the ___________ its inertia.
greater
200
According the law of conservation of momentum, when two objects collide in the absence of friction, momentum is either _____ or ______.
transferred or conserved
200
Newton's first law of motion states that an object at ________ will stay at _____and an object in _______ will stay in _______, unless acted on by outside forces.
rest (2), motion (2)
200
According to the universal law of gravitation, __________ acts on every object in the universe.
gravity
300
Which is an example of exerting a force, a train speeding down a track, or a carpenter hammering a nail?
a carpenter hammering a nail
300
The metric unit that is most often used to describe mass is the __________.
kilogram
300
How can you increase the momentum of an object?
increase the mass or increase the velocity
300
If the action force of a bat striking a ball accelerates the ball in one direction, the reaction force accelerates the bat in the ______ direction.
opposite
300
Describe two types of friction. Give an example of each type.
Static Friction - stationary object, Fluid Friction - object moving through water, Sliding Friction - object sliding across something, Rolling Friction – something to do with wheels
400
________________ acting on an object do not change the objects motion.
balanced forces
400
A person traveling in a car that suddenly stops keeps __________________________ due to inertia.
moving forward
400
The total momentum of a group of objects is conserved unless ____________ act on the objects.
outside forces
400
According to Newton's third law of motion, when a hammer strikes and exerts force on a nail, the nail does what to the hammer?
exerts an equal force back on the hammer
400
What is the law of conservation of momentum?
the total momentum of objects that interact or collide does not change, it is conserved or transferred between the objects.
500
Unbalanced forces acting on an object produce a change in the object's _________.
motion
500
A book is sitting on the dashboard of a car that is stationary. As the car starts to move forward, the book slides backward off the dashboard. Use the term inertia to explain what happened.
Because of inertia, the book wanted to remain stationary on the dashboard. Since the car moved forward suddenly and the book was not connected to any part of the car, it slid backwards off of the dashboard, because the inertia caused the book to stay stationary instead of move forward with the car.
500
The momentum of an object is in the same _______ as its velocity.
direction
500
What does Newton's second law state?
Acceleration = net force/mass
500
Why don't action and reaction forces cancel each other out?
because the forces are acting on different objects.