physics unit 1 quiz

Saturn has a surface field strength of 10.4 N kg⁻¹ and a radius of 6.03 × 10⁴ km. What is the mass of Saturn?

• 4.7 × 10¹⁸ kg

• 5.7 × 10²⁰ kg

• 4.7 × 10²⁴ kg

• 5.7 × 10²⁶ kg

If a feather and a hammer are dropped at the same time on the moon, where there is no atmosphere, which one will hit the ground first?

• Neither, there is no gravity on the moon.

• hammer because it has more mass

• feather because it has less mass

• both will hit at the same time, there is no wind resistance

What does the strength of gravity between two objects depend upon?

• Mass & distance
• Mass & weight
• Gravity & inertia
• Inertia & mass

The units of G are

Force acting on two point masses is directly proportional to

• sum of masses

• difference of masses

•    distance between masses

•    product of masses

At which point does the ball has the greatest Gravitational field?

• A

• G

• D

• C

• G

Find the force due to gravity if the mass of the object is 2300 kg and the mass of the other object is 4000 kg. The distance between the two objects is 0.150 m.

• 4.09 x 10^-3 N

• 244 N

• 2.7 x 10^-2 N

• 6.14 x 10^-4 N

What would the gravitational force be between the Sun and Mars if they were 2.3 x 10¹¹ m apart? The masses for the Sun and Jupiter are 1.99 x 10³⁰ kg and 6.42 x 10²³ kg, respectively.

• F_g = 3.8 x 10¹⁵ N

• F_g = 2.8 x 10^-42 N

• F_g = 1.6 x 10²¹ N

• F_g = 4.6 x 10^-75 N

Compute g for the surface of a planet whose radius is double that of Earth and whose mass is triple that of Earth.

g on earth's surface is

• 1.64 m/s²

• 7.36 m/s²

• 9.81 m/s²

• 14.7 m/s²