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3 years ago

Please help me with my physics I don’t understand! Please provide work.

Physics

1 answer:

arsen [322]3 years ago

7 0

Ok I figured it out and hope it’s right
So the first object moving right at 5m/s
The second one moves left at 4m/s
If we multiply 2kg (5m/s) =10 kg/m/s
Same thing with the second one 1kg(4m/s)=4kg/m/s
We got two speeds and if we add them together we get 14 but I’m not sure about the units
So the answer would be A) 14m/s

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3m/s for 12 seconds how dar would he walk

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2 years ago

If the second harmonic of a certain string is 42 Hz, what is the fundamental frequency of the string?

stich3 [128]

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2 years ago

A ball is dropped from the top of a 77 m building. With what speed does the ball hit the ground? _________ m/s

vitfil [10]

Answer:

38.87 m/s

Explanation:

Given that the ball is dropped from a height = 77 m

u = 0 m/s

s = 77 m

a = g = 9.81 m/s²

Applying the expression as:

$v^2-u^2=2as$

Applying values as:

$v^2-u^2=2as\\\Rightarrow v=\sqrt{2as+u^2}\\\Rightarrow v=\sqrt{2\times 9.81\times 77+0^2}\\\Rightarrow v=38.87\ m/s$

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3 0

2 years ago

An object in static equilibrium has a coefficient of static friction as 0.110. If the normal force acting on the object is 95.0

igomit [66]

Answer:

mass = 9.7 kg

Explanation:

As we know that when object is at rest on the ground of flat base then we will have

$N - mg = 0$

so from here

$N = mg$

now we have

N = 95 Newton

now from above equation we will have

$95 = m\times g$

$95 = m\times 9.8$

$m = 9.7 kg$

7 0

2 years ago

If a ball is rolling in a straight line and you push it to the right its velocity will to the right

Keith_Richards [23]

The answer would be "velocity will stay in the same direction." Since the ball is going in the same the ball is still going straight but just right. Many people get confused over velocity and speed, speed it the average amount on how fast a object is going and velocity is the amount of force a object has when it has speed. So, in this case since how the ball is going straight but just right it would stay in the same direction.

Hope this helps!

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3 years ago