Chapter 3 - Motion

Question 1

what does a straight horizontal line represent on a displacement time graph

Answer 1

the object is stationary

Question 2

what does a curved line represent on a displacement time graph represent

Answer 2

the object is accelerating

Question 3

what does the area under a velocity - time graph represent

Answer 3

displacement

Question 4

what does the area under an acceleration-time graph represent

Answer 4

velocity

Question 5

how can terminal velocity be determined via light gates

Answer 5

-set light gates up vertically and measure displacement between them.
- connect them to a data logger
-release item from rest above first light gate, measuring the time It takes for the object to travel between them
- using time and distance, velocity can be determined

Question 6

g

Answer 6

acceleration due to free fall. 9.81ms^2

Question 7

how can g be determined via an electromagnet

Answer 7

-the magnet would hold a steel ball above a surface, at a distance ‘d’ above
- start timer when magnet is deactivated and stop timer when ball hits surface
- use relevant SUVAT equation to find A

Question 8

a ball is projected off a castle at 6ms. how does its horizontal velocity change from launch until it hits the ground

Answer 8

it would remain constant because there’s no acceleration in the horizontal direction

Question 9

in projectile motion, what is the vertical acceleration

Answer 9

equal to ‘g’ acting downwards