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
Two objects sliding past each other experience ___________ forces.
friction
opposite charges
attract
Examples of non-contact forces include:
Magnetic force, Electrostatic force, Gravitational force
An object moving through the air experiences ______ __________. For example, a skydiver falling through the air.
air resistance
Are forces that act between two objects that are physically touching each other.
contact forces
What happens to your mass on the moon? [increases, remains the same, decreases]
remains the same
The ____________ is an instrument that is used to measure force.
spring balance
______________forces are forces that act between two objects that are not physically touching each other.
non-contact
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
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
________ is all about the interaction between objects.
force
The force of gravity (weight) ________________ as the mass increases. [increases or decreases]
increases
Like charges
repel
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
The hair on our arms are attracted to the plastic wrap. What type of force is this?
electrostatic force
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