What was Galileo trying to prove when he dropped a cannon ball and a musket ball from the leaning tower of pisa?
the mass will not effect acceleration from gravity
According to the universal law of Gravitation, which objects can exert a gravitational pull?
Gravitational force_________ as mass increases. So a massive truck would have a _______ gravitational force than a small car.
The metric acceleration of objects falling near the earth's surface, due to gravity is _________
If all objects fall long enough, they can eventually stop accelerating, and reach their _________. So the force of gravity becomes _______ to the force of air resistance stopping the acceleration of the object.
terminal velocity, equal
__________ occurs between the surface of a falling object and the air that surrounds it. So it goes against (opposes) the motion of objects through air.
When a flat piece of paper and a crumpled piece of paper are let go at he same time, which lands first?
The crumpled paper because there is less surface.
Newton's First law of Motion states
an object at rest remains at rest, and an object in motion at a constant speed and in a straight line unless acted on by an unbalanced force.
Three examples of Newtons First law of motion are
a plane parked on a runway. a chair on the floor. a golf ball balanced on a tee.
newtons second law of motion states
the acceleration of an object depends on the mass of the object and the amount of force applied.
newtons third law of motion states that
whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.
three examples of the third law of motion are
a baseball hit by a bat, when you hit your hand on the table, when a rocket blasts off.
momentum is calculated by multiply the mass of an objects ____________________
m=mass times velocity
the _________ momentum an object has, the harder it is to stop the object or change its direction. So a massive truck has a greater momentum and would be harder to stop than a smaller car.
projectile motion is __________________________
the curved path an object follows when thrown or propelled near the surface of the earth.
two examples of a projectile motion are....
a swimmer diving into water. an athlete doing a high jump
centripetal force is
an object travelling in a circle is constantly changing directions, so acceleration occurs continuously
Tells what happens when one object exerts a force on a second object is which law... A. 1st law B. 2nd law C. 3rd law
C. 3rd law