9.5 Vertical motion under gravity

Question 1

What does the force of gravity do?

Answer 1

» Cause all objects to accelerate towards the earth
» If you ignore the effects of air resistance, this acceleration is constant

Question 2

Which will reach the bottom first in a vacuum a feather or an apple?

Answer 2

» Both will reach the bottom as the acceleration due to gravity is same

Question 3

What is the value of g?

Answer 3

» 9.8 metres per second squared

Question 4

What does the degree of accuracy depend?

Answer 4

» Depends on the value of g
» Should be 2sf

Question 5

What can you do to make your life easier when solving problems in a vertical motion?

Answer 5

» You can choose the positive direction be upwards or downwards

Question 6

What is the time of flight?

Answer 6

» Total time that is in motion from the time is thrown upwards to the time to hit the ground is called time of flight

Question 7

What is the speed of projection?

Answer 7

» The initial speed