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A type of force by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward one another.
gravitational force
The hair on our arms are attracted to the plastic wrap. What type of force is this?
electrostatic force
What happens to your mass on the moon? [increases, remains the same, decreases]
remains the same
The force of gravity (weight) ________________ as the mass increases. [increases or decreases]
increases
The ____________ is an instrument that is used to measure force.
spring balance
If the force of gravity (weight) of a person on earth is 600 N, what will be his weight on the moon? Remember: The moon has 1/6 gravity of the earth.
100 N
It is important to remember that weight is not the same as mass. The weight of a person of the same mass is larger on earth due to the
earth's stronger gravity
The force that the Earth exerts on objects.
weight
Calculate the gravity force (weight) of a skydiver with a mass 70 kg falling towards the Earth? (Remember that gravitational field strength = 10 N/kg on Earth).
700 N
opposite charges
attract
Like charges
repel
Examples of non-contact forces include:
Magnetic force, Electrostatic force, Gravitational force
______________forces are forces that act between two objects that are not physically touching each other.
non-contact
An object moving through the air experiences ______ __________. For example, a skydiver falling through the air.
air resistance
Two objects sliding past each other experience ___________ forces.
friction
Are forces that act between two objects that are physically touching each other.
contact forces
________ is all about the interaction between objects.
force