8.2.3-Centripetal Force

Centripetal Force and Centripetal Acceleration

​

Multiple Choice

The centripetal force of satellites is similar to gravitational force because they are both a net force towards the center of earth.

• TRUE

• FALSE

Multiple Choice

Which represents the acceleration of the ball?

• A

• B

• C

• D

Centripetal Force is

the force on an object that makes go in a circle. The force is always directed toward the center of the circle.

F=mv²/r

Multiple Choice

What force is needed to make an object move in a

circle?

• kinetic friction

• centripetal force

• static friction

• weight

Multiple Choice

An object is traveling in a circular path

whose radius is 65m. Its acceleration is 3.0 m/s² .

What is its velocity?

• 14 m/s

• 7 m/s

• 8 m/s

​Circular Motion

​Circular motion is any motion in which an object is moving along a curved path. There are two primary forces occurring during circular motion: the force of the object moving forward (shown in blue), and the force called centripetal force (shown in red). Each of these forces are constantly causing acceleration in the object.

​Circular Motion

Centripetal force is the force which acts perpendicular to the direction of motion, toward the center of the curve. The motions of satellites and planets are also circular motion and are subject to centripetal force just like a yoyo being spun around or your keys on your lanyard when you spin them.​

Multiple Choice

Centripetal force is indicated by the __________ ray.

• black

• green

Circular Motion

• Circular motion is any motion in which an object is moving along in a curved path.

• Centripetal Force - in a circular motion, a force that acts perpendicular to the direction of motion, toward the center of the curve.

• Centripetal force is the force that keeps the object moving in a circular path. It does this by pulling an object toward the center of a circle.

The Motion of Satellites and Planets

• An example of a centripetal force is a satellite- an object in space that orbits a larger object. 

• Gravity is the centripetal force that keeps a satellite in orbit by changing its direction.

• The moon is a satellite of Earth, Earth gravity changes the moon’s direction

• The sun’s gravity changes the direction of its satellites, including Earth.

Multiple Choice

The force that causes an object to move in a circle is called centripetal force?

• True

• False

Multiple Choice

If you could turn off a centripetal force, ___________ would cause the object to fly off in a straight line.

• inertia

• momentum

• Earth

• force

Multiple Choice

______________ is the centripetal force that causes a satellite to move in a circle.

• String

• Space Shuttle

• Gravity

• Helicopter

Multiple Choice

Any object that travels around another object in space is a satellite.

• True

• False

Multiple Choice

Satellites in orbit around the Earth travel in almost circular path because Earth is

• centripetal

• free falling

• curved

• massive

Multiple Choice

The force that causes an object to move in a circle is called centripetal force?

• True

• False

Multiple Choice

______________ is the centripetal force that causes a satellite to move in a circle.

• String

• Space Shuttle

• Gravity

• Helicopter