Circular Motion and Gravity

The velocity is always _____ to the line of a circle. 

• outwards
• towards the center
• tangent
• faster

Centripetal acceleration always points

• in the direction of the object's motion
• in the opposite direction of the object's motion
• towards the center of the circle
• towards the outside of the circle

Predict the magnitude of the gravitational force a 66.5 kg person would experience while standing on the surface of each of Earth
Mass: 5.97 × 10^24 kg Radius 6.38 × 10^6 m

• 246 N
• 651 N
• 38.5 N
• 0.692 N

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Predict the magnitude of the gravitational force a 66.5 kg person would experience while standing on the surface of each of Pluto
Mass 1.25 × 10^22 kg
Radius 1.20 × 10^6 m

• 0.692 N
• 651 N
• 246 N
• 38.5 N

Tags

NGSS.HS-PS2-4

Each planet travels in an elliptical orbit around the sun,and the sun is at one of the focal points is Kepler's___ Law?

• 1st
• 2nd
• 3rd
• None of the above

Tags

NGSS.HS-ESS1-4

An imaginary line drawn from the sun to any planet sweeps out equal areas in equal time intervals is Kepler's___ Law?

• 1st
• 2nd
• 3rd
• None of the above

Mars has a mass of about 6.4 × 10^23 kg, and its moon Phobos has a mass of about 9.6 × 10^15 kg. If the magnitude of the gravitational force between the two bodies is 4.6 × 10^15 N, how far apart are Mars and Phobos?

• 18.7x10^10 m
• 8.99x10^11 m
• 9.4x10^6 m
• 19.76x10^-10 m

Tags

NGSS.HS-PS2-4

Predict the magnitude of the gravitational force a 66.5 kg person would experience while standing on the surface of Mars:
Mass 6.42 × 10^23 kg
Radius 3.40 × 10^6 m

• 246 N
• 38.5 N
• 651 N
• 0.692 N

Tags

NGSS.HS-PS2-4

Predict the magnitude of the gravitational force of 22 N would change if the mass of 2nd object was tripled?

• 46 N
• 66 N
• 65 N
• 92 N

Tags

NGSS.HS-PS2-4

Predict the magnitude of the gravitational force of 35 N, the distance was cut 1/4?

• 692 N
• 135 N
• 246 N
• 560 N

Tags

NGSS.HS-PS2-4