Circular Motion Review

At which point is the tangential velocity the greatest on Earth?

• Equator

• Antartica

• Australia

• Canada

Which of the following indicates the direction of V (tangential velocity), a (centripetal acceleration), and/or F (weight)?

• Velocity towards the center, acceleration away from center

• force towards center, acceleration tangent to circle

• acceleration towards center, velocity tangent to circle

• force tangent to circle, velocity towards center

A 62 kg student rides a Ferris wheel that has a diameter of 50 m and makes on complete rotation in 35 s. What is the centripetal velocity of the wheel?

• 8.97 s

• 8.97 m/s

• 4.49 s

• 4.49 m/s

A 62 kg student rides a Ferris wheel that has a diameter of 50 m and makes on complete rotation in 35 s. What is the centripetal acceleration of the wheel?

• 0.81 m/s

• 0.81 m/s2

• 1.6 m/s

• 1.6 m/s2

A 62 kg student rides a Ferris wheel that has a diameter of 50 m and makes on complete rotation in 35 s. What is the centripetal force acting on the wheel?

• 99.2 N

• 80 N

• 50.2 N

• 43 N

Tags

NGSS.HS-PS2-1

The law of Universal Gravitation was developed by __________ and states __________.

• Einstein; all objects orbit other objects because of warps in space-time.

• Mendeleev; all objects were formed by the gravitation of all other objects.

• Newton; all objects exert a gravitational force on all other objects.

• Hubble; the gravity of all objects is shifted based on their motion through space.

Tags

NGSS.HS-PS2-4

The quantities that the gravitational force depends on are . . .

• The mass of the 2 objects and their apparent shapes.

• The distance between the 2 objects and their relative volume.

• The mass of the 2 objects and the distance between them.

• The size of the 2 objects and the magnitude of separation between them.

Tags

NGSS.HS-PS2-4

What is the magnitude of the gravitational force acting between the moon (7.35x10^22 kg) and Earth (5.97x10^24 kg) if the distance between their centers is 3.93x10^8 meters?

• 1.89x10^20 N

• 1.89x10^26 N

• 1.89x10^30 N

• 7.62x10^28 N

Tags

NGSS.HS-PS2-4

How much force is there between the Sun and Saturn?

Sun’s mass = 2x10^30 kg

Sun’s radius = 695,500,000 m

Saturn’s mass = 5.96x10^26 kg

Saturn’s radius = 60,268,000 m

Distance from Sun to Saturn = 1.42x10^12 m

• 3.94x10^32 N

• 3.94x10^44 N

• 5.60x10^34 N

• 3.94x10^22 N

Tags

NGSS.HS-PS2-4

The force that causes an object to move in a circle is the _________________.

• Velocity

• Centripetal Force

• Centripetal Acceleration

• Degrees