A car travels 700m North and then 300m East and then 300m South. This journey takes 1 min and 40s. The total displacement is m
and the average velocity is
m/s

Step-by-step explanation:

North=700m

East= 300m

South=300m

y=700-300=400m

x= 300m

We know that the displacement is found using the Pythagoras theorem

let the displacement be d

d^2= x^2+y^2

d^2= 400^2+300^2

d^2= 160000+90000

d^2=250000

d=√250000

d=500m

2

step-by-step explanation:

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92