Motion
Physical quantities having both magnitude and direction are ______ quantities.
vector
Who developed the 3 laws of motion? (full name)
Sir Isaac Newton
Name the resistance arising to an object's motion through a fluid or across a surface
friction
The rate of doing work is called _____
power
Special form of inclined plane that modifies force and directs it to the side
wedge
In physics, any change in speed, direction, or both is?
acceleration
The thrust of a rocket is an example of the ____________
3rd law of motion
The velocity at which the force of air resistance on a falling object equals the object's weight is the _____ velocity.
terminal
The "quantity of motion" of an object, equal to the product of the object's mass and velocity, is ______.
momentum
Combination of fixed and movable pulleys
block and tackle
States the relationship between the hypotenuse and legs of a right triangle
Pythagorean theorem
For every action there is an equal and opposite reaction
3rd law of motion
What is the SI unit of force?
Newton
The SI unit of power
watt
What is the name for the distance between the ridges on a screw?
pitch
What is the average speed of a car that travels 200 km in 10 hr
20 km/hr
The velocity of an object does not change unless the object is acted upon by an external force
1st law of motion
The acceleration of gravity at the surface of the earth is?
9.81 m/s2
A man pushes an elephant with a force of 100 N for 5 mins but the animal does not budge, how much work was done?
0 J
The mechanical advantage of a machine that allows a man to lift a 1000 N box with an input force of 500 N?
2
The vector representing the change in an object's position is?
displacement
Force equals the mass of an object multiplied by its acceleration
2nd law of motion
A "center-seeking" force that causes an object to travel in a curved path rather than in a straight line is _____ force.
centripetal
When the overall external force acting on a system is zero, the momentum of the whole system remains constant
Law of conservation of momentum
A lever that has the input force and fulcrum on opposite ends of the lever with the output force between?
class 2 lever