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10 questions
Force directed toward the center of a circular path to keep the object moving in a circular path
Centripetal acceleration
Velocity
Centripetal force
Gravity
What is the relationship between time period (T) and frequency (f)?
They are opposites.
They are reciprocals.
They are the same.
They aren't actually related at all.
When an object is traveling in a circular path, the velocity and acceleration vectors are
Equal
In opposite directions
Going in circles as well
Perpendicular to each other
Which of the following choices is NOT correct about torque?
Torque causes objects to rotate.
The ability of a force to rotate an object is measured by torque.
A cat flap door that rotates on a hinge has torque.
Forces must be perpendicular to cause objects to rotate.
Which of the following is NOT a part one of Kepler's laws?
Each planet travels in a circular orbit around the sun.
An imaginary line drawn from the sun to any planet sweeps out equal areas in equal time intervals.
T^2 is proportional to r^3.
In a planet's elliptical orbit around the sun, the sun is at one of the focal points.
What causes tides?
the gravitational pull of the sun
the gravitational pull of the moon
the gravitational pull of the Earth
the gravitational pull of Mr. Klee
When escape velocity exceeds the speed of light, what happens?
The Earth rotates faster.
The sun's gravitational pull increases.
A black hole is formed.
A flash of bright light occurs.
When an object travels in circular motion, what is true about its velocity?
The velocity does not change.
The velocity vector always points away from the center of the circle.
The velocity constantly changes because its direction changes.
The magnitude of the velocity always changes.
Which of the following is TRUE?
The Earth does not have ANY gravitational pull on its moon.
The Earth's moon and the Earth exert an EQUAL equal gravitational pull on each other.
The Earth's moon has a WEAKER gravitational pull on Earth than the Earth has on its moon.
Mr. Klee exerts a STRONGER gravitational pull on his mask than his mask has on his face.
An object's centripetal acceleration is
tangent to the circular path it is traveling in
-9.8 m/s2
6.67 x 10-11 N/m2/kg2
exactly opposite of the velocity vector.
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