Question

Can you please help me with this physics question

Answer 1

Answer:

See the answers below

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.

$F_{resultant}=960+7080-7700\\F_{resultant}=340 [kN]$