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schepotkina [342]
3 years ago
5

А

Physics
2 answers:
quester [9]3 years ago
8 0

Answer:

1] C

2] A

3] B

Explanation:

Tcecarenko [31]3 years ago
5 0

Answer:

C. A. B.

Explanation:

Credit to Lainey in the comments for the answer!

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A spring whose stiffness is 980 N/m has a relaxed length of 0. 50 m. If the length of the spring changes from 0. 25 m to 0. 81 m
Gelneren [198K]

151.9j

Explanation:

PE=1/2kx^2

PE=1/2(980)(.50)= 245j

PE=(1/2)(980)(.81)= 396.9j

396.9- 245= 151.9j

8 0
2 years ago
PlS help <br>I really need help.<br>very urgent<br><br>PLS help
horsena [70]
Draw a freebody diagram, it will explain it really well

the boat is floating on top of the water, which means that the net acceleration in the y direction must be zero

the boat is not sinking (dominant downwards acceleration/force)
the boat is not flying (dominant upward acceleration/force)

that measn
F_{net_y} =0

now, if you drew the FBD, you only have 2 forces acting on the boat.
the upward bouyancy force on the boat and the downward force due to weight

F_{net_y}= F_{bouyancy} - F_{weight}

since the net force is equal to zero

F_{bouyancy} - F_{weight} = 0

and thus

F_{bouyancy} = F_{weight}
4 0
3 years ago
Does lightning McQueen have car or life insurance?
shutvik [7]
I am taking an educated guess that he has life insurance
7 0
3 years ago
If Angela ran to the bus and back to where she started what distance would she travel ?
Yakvenalex [24]

Answer:

Distance = 30 m

Explanation:

Since the position of the bus is at zero, and distance is a scalar quantity. That is, we are only concerned about the magnitude

If Angela ran to the bus and back to where she started, the distance travelled will be:

Distance = 15 + 15 = 30 m

But her displacement will be:

Displacement = 15 - 15 = 0.

5 0
3 years ago
How much work does a student (m = 60 kg) do when he Climb a tower 80 m high?
gtnhenbr [62]

Answer:

W = 47040  J

Explanation:

Given that,

The mass of a student, m = 60 kg

Height of the tower, h = 80 m

We need to find the work done in climbing the tower. The work done is given by :

W = mgh

So,

W = 60 × 9.8 × 80

W = 47040  J

So, the required work done is 47040  J.

7 0
3 years ago
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