Question

Can you please help me with this physics question

Answer 1

See the answers below

Step-by-step explanation:

We can solve both problems using vector sum.

a)

Let's assume the forces that help the diver dive as positive downward, and the forces that oppose upward, as negative

`F_(resultant)=100+30-85+900\\F_(resultant)=845[N]`

The drag force is horizontal d this way in the horizontal direction we will only have the drag force that produces the water stream.

`F_(drag)=50[N]`

b)

Let's assume the forces that propel the rocket upwards as positive and forces like the weight of the rocket and other elements as negative forces.

`F_(resultant)=960+7080-7700\\F_(resultant)=340 [kN]`