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Leni [432]
3 years ago
6

How do you find the instantaneous velocity on a position-time graph?

Physics
1 answer:
Verizon [17]3 years ago
3 0

Answer: The answer is C. Find the slope of the tangent at any point.

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A 2-kg box is pushed by a force of 4 N for 2 seconds. It has an initial velocity vo = 2 m/s to the right. NOTE: Since this probl
IRISSAK [1]

Answer:

Kf= 36 J

W(net) = 32 J

Explanation:

Given that

m = 2 kg

F= 4 N

t= 2 s

Initial velocity ,u= 2 m/s

We know that rate of change of linear momentum is called force.

F= dP/dt

F.t = ΔP

ΔP = Pf - Pi

ΔP = m v  - m u

v= Final velocity

By putting the values

4 x 2 = 2 ( v - 2)

8 =  2 ( v - 2)

4 = v - 2

v= 6 m/s

The final kinetic energy Kf

Kf= 1/2 m v²

Kf= 0.5 x 2 x 6²

Kf= 36 J

Initial kinetic energy Ki

Ki = 1/2 m u²

Ki= 0.5 x 2 x 2²

Ki = 4 J

We know that net work is equal to the change in kinetic energy

W(net) = Kf - Ki

W(net) = 36 - 4

W(net) = 32 J

7 0
3 years ago
John goes running around his neighborhood everyday after work what health -related factors will he be improving through this typ
emmainna [20.7K]
If John goes running around his neighborhood everyday after work, the health-related factors that he will be improving through this type of training is any factors that involve the improvement of cardiorespiratory systems. This would improve a lot such as his circulation, endurance, stamina, and etc. Hope this helps.
3 0
3 years ago
A compass can be used to determine the presence of charge flow in a circuit.
Sveta_85 [38]

Answer:

False

Explanation:

A compass can be used to determine relative direction but not absolute direction.

6 0
3 years ago
Harry and Hagrid needed to get money out of Gringotts bank. The bank cart was accelerating at a rate of 4 m/s2 and it had a mass
cricket20 [7]

F=m∙a

m, mass = 8,000 kg

a, accelerating rate = 4 m/s2

F=8000*4

=32000 kg m/s2

=32000 N

5 0
3 years ago
Read 2 more answers
Using the rules of significant rules what do you get when you add 24.545 and 307.3?
Katarina [22]
When adding and subtracting, significant figures rules say to have as many decimal places as the least amount in your data. So when you add them, round to one decimal place.  This is because 307.3 only has one number after the decimal place. 
4 0
3 years ago
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