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3 years ago

Tp-18 what should you do when operating a boat in large waves and high wind?

Physics

1 answer:

deff fn [24]3 years ago

5 0

1) Try to head into the waves at some slight angle and the speed of the boat should be reduced.

2) In order to ride up and over the waves, the speed of the boat should be slow.

3) The less the speed of the boat, and the less strain will be put on the hull and superstructure.

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A block is hung by a string from the inside roof of a van. when the can goes straight ahead at a speed of 28 m/s, the block hang

Elis [28]

Answer:

θ =28.07⁰

Explanation:

when van moves around an unbanked curve, horizontal component of normal force is equal to centripetal force

$F_{c}= F_{n} sin\theta$

$F_{n}sin\theta= \frac{mv^{2} }{r}$ ---(1)

There is no motion in vertical direction, so vertical component of normal force is balanced with weight of block i.e.

$F_{n}cos\theta= mg$ ----(2)

divide (1) and (2)

$\frac{F_{n}sin\theta}{F_{n}cos\theta} = \frac{\frac{mv^{2} }{r} }{mg}$

$tan \theta=\frac{v^{2} }{rg}$

$\theta=tan^{-1} \frac{v^{2} }{rg}$

v = 28 m/s

r = 150 m

g = 9.8m/ $s^{2}$

θ = 28.07⁰

5 0

3 years ago

The use of force to move an object is<br> I

Law Incorporation [45]

Answer:

and unbalanced force

Explanation:

if balanced then the object will exert as much force as you are. its like pushing against a wall. and unblanced force is like pushing against a chair

5 0

3 years ago

I need help with #3 plz and thank you

ycow [4]

Number 1 the correct answer

6 0

4 years ago

A driver of a car stopped at a gas station to fill up his gas tank. He looked at his watch, and the time read exactly 4 : 45 4:4

Sidana [21]

Answer:

Explanation:

Average rate = gallons / minutes

If 12.5gallons in 5mins

Xgallons in 1mins

12.5/5 = 2.5gallons per minute

4 0

3 years ago

Which car has the most kinetic energy?

mixas84 [53]

Answer:

B. A car of mass 2000 kg with speed 7 m/s

Explanation:

The kinetic energy of an object is given by:

$K=\frac{1}{2}mv^2$

where m is the mass of the object and v is its speed.

From the formula, we see that the larger the mass and the speed of the object, the larger its kinetic energy. Among the choices given, we see that the car with largest mass and largest speed is car B, which has a mass of 2000 kg and speed of 7 m/s. Its kinetic energy is:

$K=\frac{1}{2}(2000 kg)(7 m/s)^2=49,000 J$

We can verify that the other cars have smaller kinetic energy. In fact:

- Car A: $K=\frac{1}{2}(1000 kg)(3 m/s)^2=4,500 J$

- Car C: $K=\frac{1}{2}(1000 kg)(7 m/s)^2=24,500 J$

- Car D: $K=\frac{1}{2}(2000 kg)(3 m/s)^2=9,000 J$

So, car B is the one which has most kinetic energy.

5 0

4 years ago