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Hoochie [10]
3 years ago
12

1. Calculate the velocity of a 0.8 kg kitten with a forward momentum of 5 kg*m/s.

Physics
1 answer:
hichkok12 [17]3 years ago
8 0

Q.1

Answer . Momentum = mass x velocity

               Momentum/mass = velocity

               5/0.8 = velocity

               6.25 m/s = velocity

Q.2

Answer . F = ma => a = f/m => a = 7/3.2 => a = 2.1875m/s²

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A mover does 422 J of work pushing a crate 8.39 m. How much force did he exert?
kicyunya [14]

Answer:

50.3N

Explanation:

Work done = force x distance

422J. = force x 8.39m

÷8.39 both side to get force

Force is 50.3N to 1 d.p.

Check:

50.3 x 8.39=422.017J

Same as 422J to 1 d.p

4 0
2 years ago
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How might an intense solar storm affect people on Earth?
kow [346]

An intense solar storm COULD disrupt communications and damage the power grid. <em> (A)</em>

8 0
4 years ago
The force of earth’s gravity is 10N downward. What us the acceleration of a 15kg backpack if lifted with a a 15N force?
Anuta_ua [19.1K]

Answer:

F-F(gr) = ma

a= {F-F(gr)}/m =

=(15-10)/15=0.33 m/s² (upward)

5 0
3 years ago
Describe how you could use two photographs taken at a different time to prove that the moon is in motion
Slav-nsk [51]
<span>You can prove that moon is in motion by taking two photos with the following features:

They are taken at the same hour and minute.
They are taken on two different nights.
They are taken from the same location.

This would allow an accurate comparison and would should the moon's motion.

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5 0
3 years ago
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At summer camp, the swimming course runs the length (L) of a small lake. To determine the length of the course, the camp counsel
Oduvanchick [21]

<u>Answer:</u>

<em>The length of the swimming course is 47.16 meters.</em>

<u>Explanation:</u>

It is given that the right triangle overlaps the lake and hypotenuse L runs through the length of the lake. Thus length of the lake will be the length of this hypotenuse.

The instructors have conducted measurements of the right triangle and has found the legs to be 25 and 40 meters. The sum of squares of base and height of  a right triangle gives the value of its hypotenuse according to Pythagoras theorem.

Thus h^2+b^2=H^2

b - base

h - height.

40^2+25^2=1600+625=2225

H=\sqrt{2225}=47.16 m

6 0
3 years ago
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