Gravity I
True or False: All matter has gravity.
True
______________ is the force that causes the planets to stay in orbit as they travel around the sun.
Gravity
What is a push or a pull called that causes an object to undergo a change in speed, direction, or shape?
force
What is the unit of distance?
meter
Mass or Weight It remains the same, irrespective of the location.
mass
True or False
On Earth, the rate of acceleration due to gravity is 9.8 m/s/s.
True
In relation to time, what would equal a planet's rotation?
one day
What is the unit of force?
newton
What is the unit of work?
newton/meter or joule
Mass or Weight It is based on the amount of matter and the gravitational rate of acceleration.
weight
In the absence of air, a penny and a feather
dropped from the same height will _____. (Describe the speed at which they will fall.)
fall at the same rate
True or False
Gravity always pulls an object in a downward direction.
false...It pulls to the center of a mass.
What force opposes the motion of an object?
meter/second....
is the unit for....
speed.
Mass or Weight It can never be valued at zero.
mass
Which scientist was correct in his theory of the speed at which objects fall?
Galileo
Who stated the sun, not the earth, was the center of the universe?
Copernicus
What describes forces that do not produce zero-net force, which cause a change in motion?
unbalanced force
meters/s/s
acceleration
Will mass or weight change as you move from one planet to another?
weight
The _____ energy of an object increases
with its height above the ground.
gravitational potential
The factors that determine the amount of gravitational force between two objects are _________& ____________ .
mass of each object & the distance between the objects
What is known as the sum of forces acting on an object?
net force
55 m east..... is the unit for.....
displacement
What is the unit of mass?
kilogram