Grand Final STEM Challenge 2021 for Physics

Which of the following has the strongest gravitational pull?

• A bowling ball

• A car

• The Earth

• The Planet Mars

• The Sun

What do we call the force of Earth's gravity on an object?

• Mass

• Speed

• Acceleration

• Weight

• Energy

Choose the TRUE statement.

• The more mass an object has, the faster it will fall

• We weight more on the Moon than on Earth

• We weight less on a flying airplane than on Earth's surface

• Planet Jupiter has the strongest gravitational pull in the Solar system

Which natural phenomenon occurs due to the gravitational pull of the Moon?

• Earthquakes

• Hurricanes

• Volcanic eruptions

• Ocean tides

• All of the above

Where would you weight the most?

• Mars

• Earth

• Pluto

• The Sun

• I would weight the same everywhere

Which of the following is the unit for gravitational force?

• $kg\ m^2\ s^{-2}$
  

• $N\ m^{-1}$
  

• $kg\ m\ s^{-2}$
  

• $kg^2\ m^{-2}$

• $N\ m\ s^{-1}$

The weakest fundamental force of nature is known as

• Weak nuclear force

• Gravity

• Electromagnetic force

• Centrifugal force

• Van der Waals force

Ali's mass is 40 kg on Earth. How much will Ali weight on a planet with 4 times the mass and 3 times the radius of Earth?

• 53.3 kg

• 174 N

• 17.8 kg

• 53.3 N

• 174 kg

Choose the WRONG statement.

• Below the Earth's surface, the closer I get to the Earth's center, the smaller the acceleration due to gravity I would experience.

• Heavier objects would acceleration towards the Earth at the same rate as lighter objects.

• The gravitational acceleration at the equator is higher than that at the poles.

• Satellites farther away from the Earth would have smaller gravitational acceleration.

  $-\frac{GMm}{2r}$  

The above formula describes

• Gravitational Potential of the Moon due to Earth.

• Gravitational Potential Energy of an object on Earth.

• Total energy of a satellite moving in a circular orbit.

• Escape velocity of a rocket to be launched into space.

• Force experienced by an object in a planet with 2 times the Earth's radius.