Energy divided by time equals power.
Rate and Thanks!
The first thing you should do in this case is to realize that you have two different materials.
First we make a free body diagram.
Then, we use the definitions of mechanics to find the forces.
Finally we substitute the values to find the normal stress due to the load.
Solution attached.
Answer:
1)
2)
3)
Explanation:
Given:
width of river,
speed of stream with respect to the ground,
speed of the swimmer with respect to water,
<u>Now the resultant of the two velocities perpendicular to each other:</u>
<u>Now the angle of the resultant velocity form the vertical:</u>
- Now the distance swam by the swimmer in this direction be d.
so,
Now the distance swept downward:
2)
On swimming 37° upstream:
<u>The velocity component of stream cancelled by the swimmer:</u>
<u>Now the net effective speed of stream sweeping the swimmer:</u>
<u>The component of swimmer's velocity heading directly towards the opposite bank:</u>
<u>Now the angle of the resultant velocity of the swimmer from the normal to the stream</u>:
- Now let the distance swam in this direction be d'.
<u>Now the distance swept downstream:</u>
3)
Time taken in crossing the rive in case 1:
Time taken in crossing the rive in case 2:
Answer: 62.25
Explanation: F = ma
F = 7.5 * 8.3
F = 62.25
Thus, the answer is 62.25 Newtons.
Would appreciate brainliest <3