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Misha Larkins [42]
3 years ago
12

An object is moving at 5 m/s and a few seconds later it is moving at 3 m/s. What had to have happened?

Physics
1 answer:
Elan Coil [88]3 years ago
4 0
The correct option is C.
From the question given above, it can be seen that the acceleration of the moving object has been reduced from 5 m/s to 3 m/s, this happened because an unbalanced force acted on the object and slowed it down. An unbalanced force is any force that causes a change in motion of a moving object.
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I will mark brainlist pls help and. Give right answers
Vera_Pavlovna [14]

I think its b. Answer:

Explanation:

7 0
3 years ago
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A 50.0-kg skater begins a spin with an angular speed of 4.0 rad/s. By changing the position of her arms, the skater decreases he
Pani-rosa [81]

Answer:

The Skater's final angular speed =8rad/s

Explanation:

Let initial momentum of inertia be I1

Let final momentum of inertia be I2

But I2= I1/2

It is decreased by one-half

There is no external torque on the system, therefore

I1w1=I2w2

I1×4=(I1/2)×w2

Dividing through by I1 on both sides leaves you with:

4=w2/2

Cross multiply

W2=4×2=8rad/s

4 0
4 years ago
There are four forces acting on a car. The forces are:
Elenna [48]

Answer:

<em>| Fn | = 258 N</em>

Explanation:

<u>Net Force</u>

The net force vector is the sum of all the force vectors applied to a body.

There are four forces applied to a car:

325N to the north

175N to the south

465N to the east

255N to the west

To simplify the calculations, we find the net force by each axis separately, considering forces to the right and upward as positive.

Fx = 465 N - 255 N = 210 N

Fy = 325 N - 175 N = 150 N

The magnitude of the net force is:

|Fn|=\sqrt{210^2+150^2}

|Fn|=\sqrt{44100+22500}

|Fn|=\sqrt{66600}

| Fn | = 258 N

4 0
3 years ago
Animals which only consume other animals are called
xz_007 [3.2K]

a predator and your mom

6 0
3 years ago
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A heavy object is dropped From a vertical height of 8.0 m. What is it’s spend when it hits the ground ?
otez555 [7]

Answer:

Final speed of the ball = Vf= 12.52 m/s when it hits the ground

Explanation:

Height = S= 8.0 m

Initial Velocity= Vi = 0 m/s

Final Velocity= Vf =?

Acceleration due to gravity= a=9.8m/s²

Using Newtons third equation of motion

2as= Vf²- Vi²

2(9.8) 8= Vf²- 0

156.8= Vf²

Vf=√156.8= 12.52m/s

Final Speed of the ball is 12.52 m/s

4 0
4 years ago
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