chaper 02 - kinematics

Question 1

define displacement

Answer 1

distance travelled in a specified direction

Question 2

define of distance

Answer 2

total length travelled irrespective of the direction of motion

Question 3

define speed

Answer 3

distance travelled per unit time

Question 4

define velocity

Answer 4

rate of change of displacement

Question 5

formula to find velocity

Answer 5

v = s/t

velocity = displacement/time taken

Question 6

SI unit of velocity

Answer 6

m/s or ms-1

Question 7

define acceleration

Answer 7

rate of change of velocity

Question 8

SI unit of acceleration

Answer 8

m/s2

Question 9

formula of acceleration

Answer 9

a = v-u/t

acceleration = difference in velocity/difference in time

Question 10

name 3 scalar quantities

Answer 10

distance
speed
average speed

Question 11

name 4 vector quantities

Answer 11

displacement
velocity
average velocity
acceleration

++ any other forces (e.g weight)

Question 12

gradient of velocity time graph

Answer 12

acceleration

Question 13

area under velocity time graph

Answer 13

displacement

Question 14

gradient of speed time graph

Answer 14

speed

Question 15

area under speed time graph

Answer 15

distance

Question 16

gradient of displacement time graph

Answer 16

velocity

Question 17

gradient of distance time graph

Answer 17

speed

Question 18

define terminal velocity

Answer 18

maximum speed attained by an object

Question 19

what happens when object is at terminal velocity?

Answer 19

acceleration is zero
velocity is constant