Answer:
it's CROSSOVER I knew it because I'm a table tennis player
Answer: 2mph
Explanation:
In relative vector : Considering objects A and B
a) when two objects are moving in the same direction
Vab = Va + Vb
b) when two objects are moving in an opposite direction
Van = Va - Vb
Hence, this rule will be applied.
Speed upstream = ( 33-v ) opposite direction of the current
Downstream = ( 33+v ) same direction with the current
Distance = speed × time
Time upstream = 35/60
Time downstream = 31/60
From the formulae distance = speed × time
Upstream = ( 33-v ) × 35/60 ............ 1
Downstream = ( 33+V ) × 31/60 .............. 2
Equate 1 and 2
33-v) ×35/60 = 33+V) ×31/60
Multiply both side by 60
1155-35v = 1023+31v
1155-1023 = 31+35
132 = 66v
V = 2mph
Velocity B (relative to the A) = Velocity B (relative to the ground) - Velocity A (relative to the ground)
Velocity B (relative to the ground) = Velocity B (relative to the A) + Velocity A (relative to the ground)
Velocity B (relative to the ground) = 7.5 + 5 = 12 m/s
Since both go up in the same direction, we should use the minus sign for relative velocity.
I answered this question the answer is about 4039200
Answer:
7.4m/s
Explanation:
a=(v-u)/t
v= final velocity
u= initial velocity
note: when a body starts from rest,initial velocity,u=o
a= 18.5-0/2.5
a=7.4m/s