Gravitational Acceleration and Free Fall

All objects around us are pulled towards the centre of Earth by

• Gravitational force

• Gravitational acceleration

• Gravity attraction

• Gravity free fall

Galileo Galilei dropped two rocks of different mass from the top of the Leaning Tower of Pisa. Which rock will reach the ground first

• The bigger rock

• The smaller rock

• Two rocks reached the ground almost the same time

Free fall is the motion of an object due to ________________ force only

What causes the astronauts to float in the space ship?

• No air resistance

• No gravity force

• No air

Which of the following graph best represents an object moving against gravitational force?

• 
• 
• 
• 

What is the acceleration of the falling person by assuming that no air resistance acting on him?

• $9ms^2$

• $10ms^2$

• $100ms^2$

• $0.1ms^2$