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serious [3.7K]
3 years ago
9

5. You head downstream on a river in an outboard.

Physics
1 answer:
Bezzdna [24]3 years ago
6 0

Answer:

hope this helps you're welcome

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Two blocks, joined by a string, have masses of 6.0 kg and 9.0 kg. They rest on a frictionless horizontal surface. A 2nd string,
Gennadij [26K]

Answer:

Explanation:

30 N force is pulling total mass of 15 kg , so acceleration in the system of masses

= 30 / 15

= 2 m / s²

Let us now consider forces acting on 9 kg . 30 N is pulling it in forward direction . Tension T in the string attached to it is pulling it in reverse direction

so net force on it

30 - T

Applying Newton's law of motion on it

30 - T = mass x acceleration

30 - T = 9  x 2

30 - 18 = T

T = 12 N

4 0
4 years ago
The impulse given to a ball with mass of 2 kg is 16 N*s. If the ball starts from rest, what is its final velocity?
Alik [6]
The impulse is equal to the variation of momentum of the object:
I=\Delta p = m \Delta v
where m is the mass object and \Delta v = v_f - v_i is the variation of velocity of the object.

The ball starts from rest so its initial velocity is zero: v_i=0. So we can rewrite the formula as
I=m v_f
or 
v_f =  \frac{I}{m}

and since we know the impulse given to the ball (I=16 Ns) and its mass (m=2 kg), we can find the final velocity of the ball:
v_f =  \frac{16 Ns}{2 kg}=  8 m/s
7 0
3 years ago
Read 2 more answers
What is the external-internal pressure difference when the diver's lungs are at a depth of 6.1m (about 20ft)? assume that the di
Nesterboy [21]
Snorkel connects the diver's lungs with the air above the water. Because of this, the pressure inside the diver's lungs is the same as the atmospheric pressure.
The static pressure of a fluid is given with this equation:
P=\rho gh
The density of water is 1000kg/m^3.
P=1000\cdot 9.81 \cdot 6.1=59841$Pa
Standart atmospheric pressure is 101<span>325Pa. 
</span>The difference is:
\Delta P=101325-59841=41484 $Pa

8 0
3 years ago
How much energy does a pair of 800W hair straighteners transfer every second
Natali5045456 [20]
800 J since watts is a measurement of joules per second
3 0
4 years ago
-2
photoshop1234 [79]

Answer:-2

Explanation:

7 0
3 years ago
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