B. Performing experiments
Answer:
Fran's upstream time = 37.93 hrs
Fran's downstream time = 30.13 hrs
Explanation:
given data
speed in still water = 2.62 km/h
River flows = 0.3 km/h
Fran to swim upstream = 88 km
solution
we will apply here distance formula that is
distance = speed × time ...................1
put here value
so here
Fran's upstream speed = 2.62 km/h - 0.3 km/h = 2.32 km/h
Fran's downstream speed = 2.62 km/h + 0.3 km/h = 2.92 km/h
so
Fran's upstream time = = 37.93 hrs
Fran's downstream time = = 30.13 hrs
Hi there!
If they are in opposite direction:
- Let UP be the POSITIVE direction and DOWN be the NEGATIVE direction.
Thus:
∑F = 114.6 - 70.7 = 43.9 N upward
If they are in the SAME, downward direction:
∑F = -114.6 - 70.7 = -185.3
The magnitude is the absolute value, so:
|-185.3| = 185.3 N downward
Answer:
h = 65.021 m
Explanation:
Given that,
Initial velocity of a baseball, u = 17 m/s
It lands 2.3 seconds later.
We need to find the height of the building. Let it is h. It can be calculated using second equation of motion as follows :
here, a = g
So, the building is 65.021 m tall.