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WARRIOR [948]
3 years ago
13

You stretch a spring by a distance of 0.3 m. The spring has a spring constant of 440 N/m. When you release the spring, it snaps

back. What is the kinetic energy of the spring as it reaches its natural length?
A. 21.5 J
B. 5.94 J
C. 19.8 J
D. 8.22 J
Physics
1 answer:
Sonja [21]3 years ago
8 0

the answer is c 19.8

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If you're driving towards the sun late in the afternoon, you can reduce the glare from the road by wearing sunglasses that permi
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The correct option is B.
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3 0
3 years ago
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A rocket at rest with a mass of 942 kg is acted on by an average net force of 6,731 N upwards for 21 s. What is the final veloci
Galina-37 [17]

Answer:

Explanation:

Givens

m = 942

F = 6731

t = 21 seconds

vi = 0

vf = ?

Formula

F = m * (vf -  vi )  / t

Solution

6731 = 942*(vf - 0)/21          Multiply both sides by 21

6731 * 21 = 942*vf

141351 = 942*vf                   Divide by 942

141351/942 = vf

vf = 151 m/s

6 0
2 years ago
Hans Full is pulling on a rope to drag his backpack to school across the ice. He pulls upwards and rightwards with a force of 22
natka813 [3]

Answer:

2420 J

Explanation:

From the question given above, the following data were obtained:

Force (F) = 22.9 N

Angle (θ) = 35°

Distance (d) = 129 m

Workdone (Wd) =?

The work done can be obtained by using the following formula:

Wd = Fd × Cos θ

Wd = 22.9 × 129 × Cos 35

Wd = 22.9 × 129 × 0.8192

Wd ≈ 2420 J

Thus, the workdone is 2420 J.

3 0
3 years ago
Jeff is investigating factors that affect the growth rate of potted bean plants. Which of the following experimental variables w
Kipish [7]
It would be C. the color of the pot. its pretty obvious that i would not effect the project.

8 0
3 years ago
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