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3 years ago

HEY CAN ANYONE ANSWER DIS PLS!!!

Physics

2 answers:

SOVA2 [1]3 years ago

8 0

Answer:

Multiplied.

Explanation:

I have a positive feeling about my answer. If I'm wrong, I am terribly sorry!!!

Ahat [919]3 years ago

6 0

Answer:

B. Subtract

Explanation:

To multiply two numbers in scientific notation, multiply their coefficients and add their exponents. To divide two numbers in scientific notation, divide their coefficients, and subtract their exponents. In either case, the answer must be converted to scientific notation.

I hope this helped!

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A cart is pushed ahead for 3.5 s with a force of 360 N. Determine the change in momentum of the cart.

Katyanochek1 [597]

It is 356.5 just subtracts because it’s opposite

5 0

3 years ago

A car is moving at a speed of 50 km/hour.the driver takes her foot off the accelerator and the car coasts to stop.why?

vodka [1.7K]

Because of the opposing forces on the car like friction because there is no more acceleration

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4 years ago

The momentum of an ostrich is calculated to be 5,400 kg*km / hr Its mass is known to be 120 kg. Was the ostrich moving or standi

Dmitry [639]

The correct answer to the question is : The ostrich is motion.

EXPLANATION:

As per the question, the momentum of ostrich P = 5400 Kg. Km/hr.

The mass of the ostrich m = 120 Kg.

The momentum of a body is defined as the product of mass with velocity.

Mathematically P = mv.

The velocity of the ostrich v is calculated as -

v = $\frac{P}{m}$

= $\frac{5400}{120}\ Km/hr$

= 45 Km/hr

Hence, the ostrich is in motion as it is moving with a velocity of 45 Km/hr.

7 0

3 years ago

Read 2 more answers

The motion of as car is drawn is vi against th graph

LenKa [72]

10 and 40 would be your answer i believe.

3 0

3 years ago

A car mass 600kg starts from rest moving uniform acceleration 0.2 m/s^2 after 60 seconds collides with stationary pick up van of

galben [10]

Answer:

the phenomenon of the system supports the principle of conservation of momentum.

Explanation:

The law of conservation of momentum says that:

Initial Momentum = Final Momentum

So, first we calculate initial momentum of the system:

Initial Momentum = m₁u₁ + m₂u₂

where,

m₁ = mass of car = 600 kg

m₂ = mass of van = 400 kg

u₁ = Initial Speed of Car

For initial speed of car, we use:

Vf = Vi + at

Vf = 0 m/s + (0.2 m/s²)(60 s)

Vf = u₁ = 12 m/s

u₂ = Initial Speed of Van = 0 m/s

Therefore,

Initial Momentum = (600 kg)(12 m/s) + (400 kg)(0 m/s)

Initial Momentum = 7200 Ns --------------- equation (1)

Now, for the final momentum:

Final Momentum = m₁v₁ + m₂v₂

where,

v₁ = v₂ = Final Speed of Car and van (both are locked) = 7.2 m/s

Therefore,

Final Momentum = (600 kg)(7.2 m/s) + (400 kg)(7.2 m/s)

Final Momentum = 7200 Ns ------------- equation (2)

Comparing equation (1) and (2):

Initial momentum = Final Momentum

<u>Hence, the phenomenon of the system supports the principle of conservation of momentum.</u>

5 0

3 years ago