Newton's Law
Newton’s first law of motion states that an object will not experience a change in motion unless acted upon by a ___________________ force.
unbalanced
Newton’s third law of motion states that if one object exerts a force on another object, then the second object exerts a force of equal strength in the ________________ direction.
opposite
Which of the following, moving at the same speed, would be hardest to stop
Car
Fire engine
Frisbee
stroller
fire engine
Which moving object, in all likelihood, will have the greatest momentum?
Volleyball hit by a fourth grader
Volleyball hit by an olympic volleyball player
Volleyball hit by a senior adult
Volleyball hit by a basketball coach
b. volleyball hit by an olympic volleyball player
To increase acceleration of an object, you reduce its _________________ or increase the applied force.
mass
Resistance to change in motion is called ____________________.
inertia
Which formula is used to calculate momentum?
Momentum = mass x speed
Momentum = weight x speed
Momentum = volume x velocity
Momentum = mass x velocity
momentum = mass x velocity
In which situation does the law of conservation of momentum apply?
In the absence of greatest velocity
In the presence of least velocity
In the absence of outside forces
In the presence of outside forces
in the absence of outside forces
Action and reaction forces acting in opposite directions _____________ cancel out because they act on different objects.
do not
If you lean against a wall, the wall pushes back on you with a _______________ force.
equal
The total momentum of any group of objects _____________________ unless outside forces act on the object.
remains the same
If outside orces such as friction are negligible, when two objects of the same mass collide and do not stick together, the objects _________________ velocities.
trade
Newton’s second law of motion states that an object’s acceleration depends on its ____________________ and on the net force acting on it.
mass
Acceleration is measured in __________________________.
meters per second
Newton’s “quantitiy of motion” is ________________.
momentum
The less momentum an object has, the ________________it is to stop.
easier
Force is measured in a unit called the____________________________.
The smaller the mass of an object, the ___________________ inertia.
Momentum, like velocity, is described by both a _________________________________________.
direction and strength
The momentum of a 1000 kg vehicle traveling at a velocity of 25 m/s is _______________________.
25,000 kg x m/s