Understanding Free Fall and Gravity

What is the basic condition for an object to be in free fall?

• It must be in a vacuum.

• It must be moving horizontally.

• Gravity must be the only force acting on it.

• It must be moving upwards.

Why is it a misconception that free fall only implies downward motion?

• Because objects can only fall downwards.

• Because free fall requires an upward force.

• Because gravity affects objects only when they are moving down.

• Because gravity acts on objects regardless of their direction of motion.

What is the acceleration due to gravity on Earth?

• 9.8 m/s²

• 22 m/s²

• 35 km/h

• 44 mph

How fast does an object fall in one second on Earth?

• 16 feet

• 32 feet

• 44 feet

• 64 feet

What is the effect of air resistance on a falling object?

• It increases the speed of the object.

• It decreases the speed of the object.

• It has no effect on the object.

• It changes the direction of the object.

What is terminal velocity?

• The maximum speed an object can reach when falling.

• The speed at which an object stops falling.

• The speed at which gravity no longer acts on an object.

• The speed at which air resistance is zero.

How does gravity change as you move away from Earth?

• It remains constant.

• It decreases gradually.

• It becomes zero immediately.

• It increases significantly.

What is the gravity experienced by astronauts on the International Space Station?

• Zero

• 9.8 m/s²

• 19 mph per second

• 6 1,000 of a M hour per second

Why do astronauts appear weightless in space?

• Because they are falling at the same rate as the space station.

• Because they are in a vacuum.

• Because there is no gravity in space.

• Because they are moving upwards.

What is the distance of the Moon from Earth?

• 62 miles

• 257 miles

• 240,000 miles

• 1,000,000 miles