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goldenfox [79]
2 years ago
11

I NEED AN ANSWER!

Physics
1 answer:
Lera25 [3.4K]2 years ago
5 0

Answer:

Before sled starts to move it has a potential energy due to the elevation...and then that potential energy converted to kinetic energy due to presence of a velocity...the sled will continue to move if their is no resesive force...but however friction force is presence that cause the sled to stop....

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A typical mattress has a network of springs that provide support. If you sit on a mattress, the springs compress. A heavier pers
GenaCL600 [577]

Answer:

Explanation:

Spring has a tendency to store energy in them and deform its shape when force is applied on it. Once the applied force is removed it regains its original shape and size.

It is in helical shape and is used in mattress to give structure and support. Spring have elastic nature and follows spring forces, F = k * x

where is the applied force, k is the spring constant and x is the amount of extension.

When a heavier person sits on a mattress, more weight is applied on springs and they form coils, as weight is removed they regains its shape again.

4 0
3 years ago
An object releasing energy is evidence of which type of chemical change?
Ray Of Light [21]
Exothermic is the answer to your question
8 0
2 years ago
A 0.10-kg ball, traveling horizontally at 25 m/s, strikes a wall and rebounds at 19 m/s. What is the 7) magnitude of the change
IRISSAK [1]

Answer:

Change in momentum will be -4.4 kgm/sec

So option (A) is correct option

Explanation:

Mass of the ball is given m = 0.10 kg

Initial velocity of ball v_1=25m/sec

And velocity after rebound v_2=-19m/sec

We have to find the change in momentum

So change in momentum is equal to =m(v_2-v_1)=0.1\times (-19-25)=-4.4kgm/sec ( here negative sign shows only direction )

So option (A) will be correct answer

5 0
2 years ago
Why is chopping carrots a physical change ?
astra-53 [7]

Answer: Chopping carrots is a chemical change because you aren't changing the property its substance, you are just chopping it up, there is no new substance being formed.

Explanation:

5 0
3 years ago
Read 2 more answers
Acar goes from 20m/s to 30m/s in 10 seconds what is its acceleration
prohojiy [21]

Acceleration = change in velocity/change in time

                     = (30 - 20) / 10 - 0

                      = 10 / 10

Acceleration = 1 m/s²

8 0
3 years ago
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